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Card Number Validation in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 801st MeWhenI 🇻🇦 499 149 54ms 4 Oct 2024 802nd CheeseCake628 🇳🇴 499 160 108ms 5 Nov 2024 803rd pres-abhisheksinha 496 161 10ms 8 Oct 2024 804th HumanoidCPU 493 145 544ms 5 Oct 2024 805th CarterStroik 493 161 2ms 19 Nov 2025 806th owen-c-parker 🇺🇸 492 131 14ms 1 Oct 2024 807th ibixina 492 162 10ms 13 Oct 2024 807th TheAtrossian 492 162 13ms 5 Jan 2025 809th h-hh-hhh 🇺🇦 491 177 63ms 2 Nov 2024 810th snoozingnewt 🇨🇦 490 150 198ms 2 Nov 2025 811th snoozingnewt 🇨🇦 490 249 26ms 2 Nov 2025 812th zgialor-lab 489 163 18ms 9 days ago 813th JunkIce 488 136 581ms 3 Dec 2024 814th snoozingnewt 🇨🇦 486 117 1,631ms 2 Nov 2025 815th Vaekor 484 165 11ms 15 Dec 2024 816th snoozingnewt 🇨🇦 483 173 408ms 2 Nov 2025 817th mitzal 483 180 63ms 9 Feb 2025 818th h-hh-hhh 🇺🇦 481 147 1ms 2 Nov 2024 819th MiffOttah 477 150 506ms 6 Oct 2024 819th mwarvik 🇳🇴 477 150 446ms 1 Jan 2026 821st alphafalfa 473 92 2ms 8 Nov 2024 822nd JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 823rd luca1339 472 198 414ms 4 Nov 2024 824th Maximizer02 471 201 12ms 1 Oct 2024 825th ejini6969 470 102 38ms 14 Jun 2025 826th jbjd 469 151 2ms 4 Feb 2026 827th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 828th snoozingnewt 🇨🇦 469 200 260ms 2 Nov 2025 829th ComputerKWasTaken 🇺🇸 467 171 11ms 14 Oct 2024 830th snoozingnewt 🇨🇦 465 121 214ms 27 Nov 2025 831st iczelia 🇩🇪 463 94 2ms 23 Sep 2025 832nd Jacob385 462 202 420ms 2 Oct 2024 833rd madex 🇩🇪 461 104 40ms 2 Oct 2024 834th navier-1 461 173 10ms 22 Sep 2025 834th ComradeSquirrel 461 173 10ms 9 days ago 836th TheZwierzLF 🇵🇱 456 105 37ms 8 Jan 2026 837th snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 838th IISResetMe 454 103 488ms 27 Nov 2025 839th Arkadios200 454 180 130ms 15 days ago 840th snoozingnewt 🇨🇦 453 96 2ms 2 Nov 2025 841st clayboll99 453 176 11ms 10 Jul 2025 842nd dokutan 451 63 3ms 26 Nov 2024 843rd snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 844th muser-logiccpu 🇺🇦 451 177 18ms 9 Aug 2025 845th OSYCh314 🇦🇺 448 178 11ms 2 Nov 2024 846th grey0ut 446 105 464ms 11 Jan 2025 847th dokutan 445 109 10ms 19 Oct 2024 848th calum12345 443 180 11ms 26 Mar 2025 849th MyXoToD 🇩🇪 442 146 10ms 26 May 2025 850th Yewzir 🇧🇪 442 171 14ms 26 Dec 2024 851st CheeseCake628 🇳🇴 439 151 532ms 18 Oct 2025 852nd zt14427 438 182 10ms 27 Dec 2024 853rd IoLimmer 436 183 11ms 10 Oct 2024 854th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 855th snoozingnewt 🇨🇦 432 111 36ms 2 Nov 2025 856th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 857th varhammer 🇷🇺 431 223 12ms 23 Feb 2025 858th estomagordo 🇳🇱 429 186 11ms 15 Jul 2025 859th dokutan 426 132 334ms 3 Oct 2024 860th JOrE20 424 136 751ms 7 Dec 2025 861st MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 862nd scpchicken 🇵🇼 418 91 187ms 24 days ago 863rd aksyristos 411 172 2ms 23 Nov 2025 864th snoozingnewt 🇨🇦 411 267 28ms 18 Dec 2025 865th Mabeloid 🇳🇴 406 159 11ms 12 Oct 2024 866th snoozingnewt 🇨🇦 404 223 96ms 2 Nov 2025 867th Ralac07 🇦🇺 398 162 14ms 3 Oct 2024 868th snoozingnewt 🇨🇦 392 276 40ms 6 Dec 2025 869th dieggsy 389 247 19ms 10 Oct 2024 870th snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 871st fischfood 385 176 5ms 22 Oct 2024 872nd JOrE20 385 191 157ms 27 Jan 2026 873rd ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 874th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 875th KatieLG 🇬🇧 375 218 118ms 21 Nov 2025 876th RobGLambert 375 232 1,411ms 8 Jun 2025 877th RedzGoose 🇦🇺 371 187 119ms 2 Oct 2024 878th P1nk-P0nk 369 215 3ms 18 Oct 2024 879th gautambp 366 218 11ms 24 Jun 2025 880th snoozingnewt 🇨🇦 360 267 13ms 2 Nov 2025 881st sciencejiho 359 197 2ms 11 Feb 2025 882nd The-Wolfson 355 230 111ms 16 Dec 2024 883rd Zhenyu-Bo 350 228 11ms 30 Jul 2025 884th EthanJantz 347 230 12ms 5 Sep 2025 885th RobGLambert 343 273 200ms 8 Jun 2025 886th Inbarw100 342 207 2ms 25 days ago 887th Ernest1338 341 275 276ms 26 Oct 2024 888th noahhorlacher 338 191 12ms 7 Dec 2024 889th RobertBurs 337 237 11ms 22 Sep 2025 890th TJK-S 331 241 12ms 25 Oct 2025 890th NoneTheFewer 331 241 11ms 25 Dec 2025 892nd JOrE20 314 389 56ms 4 Dec 2025 893rd te-chnical 309 258 222ms 4 May 2025 894th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 895th KatieLG 🇬🇧 300 290 2,515ms 1 Oct 2025 896th kasarino 295 240 2ms 8 Feb 2026 897th KatieLG 🇬🇧 294 241 2ms 1 Oct 2025 898th fantaize 284 330 204ms 10 Mar 2026 899th ReterikHub 280 310 215ms 17 Jan 2025 900th Mikey-Beep 🇬🇧 277 344 17ms 9 days ago First Prev 801–900 of 946 Next Last