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) Taxicab Numbers 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 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) Taxicab Numbers 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 Turtle Tutorial # Golfer Points Bytes Time Submitted 800th HumanoidCPU 502 141 1ms 7 Mar 2025 802nd webmiche 502 159 11ms 3 Nov 2025 803rd blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 804th Mabeloid 🇳🇴 499 133 572ms 2 Oct 2024 805th MeWhenI 🇻🇦 499 149 54ms 4 Oct 2024 806th CheeseCake628 🇳🇴 499 160 108ms 5 Nov 2024 807th pres-abhisheksinha 496 161 10ms 8 Oct 2024 808th HumanoidCPU 494 145 544ms 5 Oct 2024 809th CarterStroik 493 161 2ms 19 Nov 2025 810th ibixina 493 162 10ms 13 Oct 2024 810th TheAtrossian 493 162 13ms 5 Jan 2025 812th owen-c-parker 🇺🇸 492 131 12ms 1 Oct 2024 813th h-hh-hhh 🇺🇦 491 177 63ms 2 Nov 2024 814th snoozingnewt 🇨🇦 490 150 198ms 2 Nov 2025 815th zgialor-lab 490 163 17ms 11 days ago 816th snoozingnewt 🇨🇦 490 249 26ms 2 Nov 2025 817th JunkIce 488 136 581ms 3 Dec 2024 818th snoozingnewt 🇨🇦 486 117 1,310ms 2 Nov 2025 819th Vaekor 484 165 11ms 15 Dec 2024 820th snoozingnewt 🇨🇦 483 173 408ms 2 Nov 2025 821st mitzal 483 180 63ms 9 Feb 2025 822nd h-hh-hhh 🇺🇦 481 147 1ms 2 Nov 2024 823rd MiffOttah 478 150 506ms 6 Oct 2024 823rd mwarvik 🇳🇴 478 150 446ms 1 Jan 2026 825th alphafalfa 473 92 2ms 8 Nov 2024 826th JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 827th luca1339 472 198 414ms 4 Nov 2024 828th Maximizer02 471 201 12ms 1 Oct 2024 829th ejini6969 470 102 38ms 14 Jun 2025 830th jbjd 469 151 2ms 4 Feb 2026 831st zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 832nd snoozingnewt 🇨🇦 469 200 260ms 2 Nov 2025 833rd ComputerKWasTaken 🇺🇸 467 171 11ms 14 Oct 2024 834th snoozingnewt 🇨🇦 465 121 214ms 27 Nov 2025 835th iczelia 🇩🇪 463 94 2ms 23 Sep 2025 836th Jacob385 462 202 420ms 2 Oct 2024 837th madex 🇩🇪 461 104 40ms 2 Oct 2024 838th navier-1 461 173 10ms 22 Sep 2025 838th ComradeSquirrel 461 173 10ms 12 days ago 840th TheZwierzLF 🇵🇱 456 105 37ms 8 Jan 2026 841st snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 842nd IISResetMe 454 103 488ms 27 Nov 2025 843rd Arkadios200 454 180 130ms 18 days ago 844th snoozingnewt 🇨🇦 453 96 2ms 2 Nov 2025 845th clayboll99 453 176 11ms 10 Jul 2025 846th dokutan 451 63 3ms 26 Nov 2024 847th snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 848th muser-logiccpu 🇺🇦 451 177 18ms 9 Aug 2025 849th OSYCh314 🇦🇺 448 178 11ms 2 Nov 2024 850th grey0ut 446 105 464ms 11 Jan 2025 851st dokutan 445 109 10ms 19 Oct 2024 852nd calum12345 443 180 11ms 26 Mar 2025 853rd MyXoToD 🇩🇪 442 146 10ms 26 May 2025 854th Yewzir 🇧🇪 442 171 14ms 26 Dec 2024 855th CheeseCake628 🇳🇴 439 151 532ms 18 Oct 2025 856th zt14427 438 182 10ms 27 Dec 2024 857th IoLimmer 436 183 11ms 10 Oct 2024 858th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 859th snoozingnewt 🇨🇦 432 111 36ms 2 Nov 2025 860th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 861st varhammer 🇷🇺 431 223 12ms 23 Feb 2025 862nd estomagordo 🇳🇱 429 186 11ms 15 Jul 2025 863rd dokutan 426 132 334ms 3 Oct 2024 864th JOrE20 424 136 751ms 7 Dec 2025 865th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 866th scpchicken 🇵🇼 418 91 187ms 26 days ago 867th aksyristos 411 172 2ms 23 Nov 2025 868th snoozingnewt 🇨🇦 411 267 28ms 18 Dec 2025 869th Mabeloid 🇳🇴 406 159 15ms 12 Oct 2024 870th snoozingnewt 🇨🇦 404 223 96ms 2 Nov 2025 871st Ralac07 🇦🇺 398 162 12ms 3 Oct 2024 872nd snoozingnewt 🇨🇦 392 276 47ms 6 Dec 2025 873rd dieggsy 389 247 19ms 10 Oct 2024 874th snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 875th fischfood 385 176 5ms 22 Oct 2024 876th JOrE20 385 191 157ms 27 Jan 2026 877th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 878th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 879th KatieLG 🇬🇧 375 218 118ms 21 Nov 2025 880th RobGLambert 375 232 1,411ms 8 Jun 2025 881st RedzGoose 🇦🇺 371 187 119ms 2 Oct 2024 882nd P1nk-P0nk 369 215 3ms 18 Oct 2024 883rd gautambp 366 218 11ms 24 Jun 2025 884th snoozingnewt 🇨🇦 360 267 13ms 2 Nov 2025 885th sciencejiho 359 197 2ms 11 Feb 2025 886th The-Wolfson 355 230 111ms 16 Dec 2024 887th Zhenyu-Bo 350 228 11ms 30 Jul 2025 888th EthanJantz 347 230 12ms 5 Sep 2025 889th RobGLambert 343 273 200ms 8 Jun 2025 890th Inbarw100 342 207 2ms 27 days ago 891st Ernest1338 341 275 276ms 26 Oct 2024 892nd noahhorlacher 338 191 11ms 7 Dec 2024 893rd RobertBurs 337 237 11ms 22 Sep 2025 894th TJK-S 331 241 12ms 25 Oct 2025 894th NoneTheFewer 331 241 11ms 25 Dec 2025 896th JOrE20 314 389 56ms 4 Dec 2025 897th te-chnical 309 258 222ms 4 May 2025 898th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 899th KatieLG 🇬🇧 300 290 2,515ms 1 Oct 2025 900th kasarino 295 240 2ms 8 Feb 2026 First Prev 801–900 of 951 Next Last