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 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 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 snoozingnewt 🇨🇦 493 249 26ms 2 Nov 2025 802nd owen-c-parker 🇺🇸 492 131 11ms 1 Oct 2024 803rd ibixina 492 162 10ms 13 Oct 2024 803rd TheAtrossian 492 162 13ms 5 Jan 2025 805th h-hh-hhh 🇺🇦 492 177 66ms 2 Nov 2024 806th JunkIce 489 136 581ms 3 Dec 2024 807th snoozingnewt 🇨🇦 487 117 1,338ms 2 Nov 2025 808th Vaekor 483 165 11ms 15 Dec 2024 809th snoozingnewt 🇨🇦 483 173 377ms 2 Nov 2025 810th mitzal 483 180 61ms 9 Feb 2025 811th h-hh-hhh 🇺🇦 481 147 1ms 2 Nov 2024 812th MiffOttah 477 150 468ms 6 Oct 2024 812th mwarvik 🇳🇴 477 150 484ms 1 Jan 2026 814th Maximizer02 473 201 12ms 1 Oct 2024 815th alphafalfa 472 92 2ms 8 Nov 2024 816th JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 817th luca1339 472 198 425ms 4 Nov 2024 818th ejini6969 470 102 38ms 14 Jun 2025 819th jbjd 469 151 2ms 4 Feb 2026 820th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 821st snoozingnewt 🇨🇦 469 200 230ms 2 Nov 2025 822nd ComputerKWasTaken 🇺🇸 467 171 11ms 14 Oct 2024 823rd snoozingnewt 🇨🇦 466 121 214ms 27 Nov 2025 824th Jacob385 463 202 411ms 2 Oct 2024 825th iczelia 🇩🇪 462 94 2ms 23 Sep 2025 826th madex 🇩🇪 461 104 37ms 2 Oct 2024 827th navier-1 461 173 10ms 22 Sep 2025 828th TheZwierzLF 🇵🇱 457 105 37ms 8 Jan 2026 829th snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 830th Arkadios200 455 180 109ms 2 days ago 831st IISResetMe 453 103 483ms 27 Nov 2025 832nd clayboll99 453 176 11ms 10 Jul 2025 833rd snoozingnewt 🇨🇦 452 96 2ms 2 Nov 2025 834th dokutan 451 63 3ms 26 Nov 2024 835th snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 836th muser-logiccpu 🇺🇦 451 177 18ms 9 Aug 2025 837th OSYCh314 🇦🇺 448 178 11ms 2 Nov 2024 838th dokutan 447 109 10ms 19 Oct 2024 839th grey0ut 444 105 427ms 11 Jan 2025 840th calum12345 443 180 11ms 26 Mar 2025 841st MyXoToD 🇩🇪 442 146 13ms 26 May 2025 842nd Yewzir 🇧🇪 442 171 12ms 26 Dec 2024 843rd CheeseCake628 🇳🇴 440 151 532ms 18 Oct 2025 844th zt14427 438 182 10ms 27 Dec 2024 845th IoLimmer 436 183 11ms 10 Oct 2024 846th KatieLG 🇬🇧 434 183 2ms 2 Oct 2025 847th varhammer 433 223 12ms 23 Feb 2025 848th snoozingnewt 🇨🇦 432 111 34ms 2 Nov 2025 849th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 850th estomagordo 🇳🇱 429 186 11ms 15 Jul 2025 851st dokutan 427 132 334ms 3 Oct 2024 852nd jusaka 426 201 26ms 14 hours ago 853rd JOrE20 425 136 1,075ms 7 Dec 2025 854th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 855th scpchicken 🇵🇼 419 91 160ms 11 days ago 856th ComradeSquirrel 415 192 10ms 15 hours ago 857th snoozingnewt 🇨🇦 415 267 28ms 18 Dec 2025 858th jusaka 412 369 1,679ms 16 hours ago 859th aksyristos 411 172 2ms 23 Nov 2025 860th Mabeloid 🇳🇴 406 159 14ms 12 Oct 2024 861st snoozingnewt 🇨🇦 406 223 96ms 2 Nov 2025 862nd Ralac07 🇦🇺 398 162 16ms 3 Oct 2024 863rd snoozingnewt 🇨🇦 395 276 40ms 6 Dec 2025 864th dieggsy 391 247 19ms 10 Oct 2024 865th snoozingnewt 🇨🇦 390 313 40ms 2 Nov 2025 866th JOrE20 387 191 157ms 27 Jan 2026 867th fischfood 386 176 5ms 22 Oct 2024 868th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 869th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 870th KatieLG 🇬🇧 376 218 112ms 21 Nov 2025 871st jusaka 376 258 43ms 13 hours ago 872nd RobGLambert 375 232 1,395ms 8 Jun 2025 873rd RedzGoose 🇦🇺 373 187 109ms 2 Oct 2024 874th P1nk-P0nk 369 215 3ms 18 Oct 2024 875th gautambp 366 218 11ms 24 Jun 2025 876th snoozingnewt 🇨🇦 362 267 13ms 2 Nov 2025 877th sciencejiho 359 197 2ms 11 Feb 2025 878th The-Wolfson 356 230 110ms 16 Dec 2024 879th Zhenyu-Bo 350 228 11ms 30 Jul 2025 880th EthanJantz 347 230 12ms 5 Sep 2025 First Prev 801–880 of 994 Next Last