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 NFA Simulator 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 NFA Simulator 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 Mabeloid 🇳🇴 499 133 572ms 2 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 snoozingnewt 🇨🇦 493 150 198ms 2 Nov 2025 806th CarterStroik 493 161 2ms 19 Nov 2025 807th snoozingnewt 🇨🇦 493 249 26ms 2 Nov 2025 808th owen-c-parker 🇺🇸 492 131 14ms 1 Oct 2024 809th ibixina 492 162 10ms 13 Oct 2024 809th TheAtrossian 492 162 13ms 5 Jan 2025 811th h-hh-hhh 🇺🇦 492 177 63ms 2 Nov 2024 812th zgialor-lab 489 163 18ms 3 days ago 813th JunkIce 488 136 581ms 3 Dec 2024 814th snoozingnewt 🇨🇦 487 117 1,631ms 2 Nov 2025 815th snoozingnewt 🇨🇦 485 173 377ms 2 Nov 2025 816th Vaekor 484 165 11ms 15 Dec 2024 817th mitzal 483 180 63ms 9 Feb 2025 818th h-hh-hhh 🇺🇦 482 147 1ms 2 Nov 2024 819th MiffOttah 477 150 506ms 6 Oct 2024 819th mwarvik 🇳🇴 477 150 446ms 1 Jan 2026 821st alphafalfa 474 92 2ms 8 Nov 2024 822nd Maximizer02 473 201 12ms 1 Oct 2024 823rd JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 824th luca1339 472 198 425ms 4 Nov 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 🇨🇦 466 121 214ms 27 Nov 2025 831st iczelia 🇩🇪 464 94 2ms 23 Sep 2025 832nd Jacob385 463 202 411ms 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 3 days ago 836th TheZwierzLF 🇵🇱 457 105 37ms 8 Jan 2026 837th snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 838th Arkadios200 455 180 130ms 10 days ago 839th snoozingnewt 🇨🇦 454 96 2ms 2 Nov 2025 840th IISResetMe 454 103 488ms 27 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 dokutan 447 109 10ms 19 Oct 2024 847th grey0ut 446 105 464ms 11 Jan 2025 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 🇳🇴 440 151 532ms 18 Oct 2025 852nd zt14427 438 182 10ms 27 Dec 2024 853rd IoLimmer 436 183 11ms 10 Oct 2024 854th KatieLG 🇬🇧 434 183 2ms 2 Oct 2025 855th varhammer 433 223 12ms 23 Feb 2025 856th snoozingnewt 🇨🇦 432 111 36ms 2 Nov 2025 857th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 858th estomagordo 🇳🇱 429 186 11ms 15 Jul 2025 859th dokutan 427 132 334ms 3 Oct 2024 860th MeWhenI 🇻🇦 426 143 6ms 2 Oct 2024 861st jusaka 426 201 26ms 7 days ago 862nd JOrE20 425 136 1,075ms 7 Dec 2025 863rd scpchicken 🇵🇼 419 91 160ms 18 days ago 864th jusaka 417 369 1,660ms 8 days ago 865th snoozingnewt 🇨🇦 415 267 28ms 18 Dec 2025 866th aksyristos 412 172 2ms 23 Nov 2025 867th Mabeloid 🇳🇴 406 159 11ms 12 Oct 2024 868th snoozingnewt 🇨🇦 406 223 96ms 2 Nov 2025 869th Ralac07 🇦🇺 398 162 14ms 3 Oct 2024 870th jusaka 396 281 154ms 7 days ago 871st snoozingnewt 🇨🇦 395 276 40ms 6 Dec 2025 872nd dieggsy 391 247 19ms 10 Oct 2024 873rd snoozingnewt 🇨🇦 390 313 40ms 2 Nov 2025 874th JOrE20 387 191 157ms 27 Jan 2026 875th ehulinsky 🇺🇸 386 158 5ms 2 Apr 2025 876th fischfood 386 176 5ms 22 Oct 2024 877th c0d3-4-F00d 🇩🇪 385 184 2ms 9 Jan 2025 878th KatieLG 🇬🇧 376 218 118ms 21 Nov 2025 879th jusaka 376 258 43ms 7 days ago 880th RobGLambert 375 232 1,411ms 8 Jun 2025 First Prev 801–880 of 1,009 Next Last