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 801st webmiche 502 159 11ms 3 Nov 2025 802nd blaztoma 🇱🇹 500 154 119ms 28 Nov 2025 803rd Mabeloid 🇳🇴 499 133 572ms 2 Oct 2024 804th MeWhenI 🇻🇦 499 149 54ms 4 Oct 2024 805th CheeseCake628 🇳🇴 499 160 108ms 5 Nov 2024 806th pres-abhisheksinha 496 161 10ms 8 Oct 2024 807th HumanoidCPU 494 145 544ms 5 Oct 2024 808th CarterStroik 493 161 2ms 19 Nov 2025 809th ibixina 493 162 10ms 13 Oct 2024 809th TheAtrossian 493 162 13ms 5 Jan 2025 811th owen-c-parker 🇺🇸 492 131 12ms 1 Oct 2024 812th h-hh-hhh 🇺🇦 491 177 63ms 2 Nov 2024 813th snoozingnewt 🇨🇦 490 150 198ms 2 Nov 2025 814th zgialor-lab 490 163 17ms 11 days ago 815th snoozingnewt 🇨🇦 490 249 26ms 2 Nov 2025 816th JunkIce 488 136 581ms 3 Dec 2024 817th snoozingnewt 🇨🇦 486 117 1,310ms 2 Nov 2025 818th Vaekor 484 165 11ms 15 Dec 2024 819th snoozingnewt 🇨🇦 483 173 408ms 2 Nov 2025 820th mitzal 483 180 63ms 9 Feb 2025 821st h-hh-hhh 🇺🇦 481 147 1ms 2 Nov 2024 822nd MiffOttah 478 150 506ms 6 Oct 2024 822nd mwarvik 🇳🇴 478 150 446ms 1 Jan 2026 824th alphafalfa 473 92 2ms 8 Nov 2024 825th JesseNoEyes 🇺🇸 472 169 10ms 1 Oct 2024 826th luca1339 472 198 414ms 4 Nov 2024 827th Maximizer02 471 201 12ms 1 Oct 2024 828th ejini6969 470 102 38ms 14 Jun 2025 829th jbjd 469 151 2ms 4 Feb 2026 830th zyc-2024 🇨🇳 469 170 10ms 5 Oct 2024 831st snoozingnewt 🇨🇦 469 200 260ms 2 Nov 2025 832nd ComputerKWasTaken 🇺🇸 467 171 11ms 14 Oct 2024 833rd snoozingnewt 🇨🇦 465 121 214ms 27 Nov 2025 834th iczelia 🇩🇪 463 94 2ms 23 Sep 2025 835th Jacob385 462 202 420ms 2 Oct 2024 836th madex 🇩🇪 461 104 40ms 2 Oct 2024 837th navier-1 461 173 10ms 22 Sep 2025 837th ComradeSquirrel 461 173 10ms 11 days ago 839th TheZwierzLF 🇵🇱 456 105 37ms 8 Jan 2026 840th snoozingnewt 🇨🇦 455 149 5ms 2 Nov 2025 841st IISResetMe 454 103 488ms 27 Nov 2025 842nd Arkadios200 454 180 130ms 17 days ago 843rd snoozingnewt 🇨🇦 453 96 2ms 2 Nov 2025 844th clayboll99 453 176 11ms 10 Jul 2025 845th dokutan 451 63 3ms 26 Nov 2024 846th snoozingnewt 🇨🇦 451 176 2ms 2 Nov 2025 847th muser-logiccpu 🇺🇦 451 177 18ms 9 Aug 2025 848th OSYCh314 🇦🇺 448 178 11ms 2 Nov 2024 849th grey0ut 446 105 464ms 11 Jan 2025 850th dokutan 445 109 10ms 19 Oct 2024 851st calum12345 443 180 11ms 26 Mar 2025 852nd MyXoToD 🇩🇪 442 146 10ms 26 May 2025 853rd Yewzir 🇧🇪 442 171 14ms 26 Dec 2024 854th CheeseCake628 🇳🇴 439 151 532ms 18 Oct 2025 855th zt14427 438 182 10ms 27 Dec 2024 856th IoLimmer 436 183 11ms 10 Oct 2024 857th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 858th snoozingnewt 🇨🇦 432 111 36ms 2 Nov 2025 859th KatieLG 🇬🇧 431 108 6ms 13 Oct 2024 860th varhammer 🇷🇺 431 223 12ms 23 Feb 2025 861st estomagordo 🇳🇱 429 186 11ms 15 Jul 2025 862nd dokutan 426 132 334ms 3 Oct 2024 863rd JOrE20 424 136 751ms 7 Dec 2025 864th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 865th scpchicken 🇵🇼 418 91 187ms 26 days ago 866th aksyristos 411 172 2ms 23 Nov 2025 867th snoozingnewt 🇨🇦 411 267 28ms 18 Dec 2025 868th Mabeloid 🇳🇴 406 159 15ms 12 Oct 2024 869th snoozingnewt 🇨🇦 404 223 96ms 2 Nov 2025 870th Ralac07 🇦🇺 398 162 12ms 3 Oct 2024 871st snoozingnewt 🇨🇦 392 276 47ms 6 Dec 2025 872nd dieggsy 389 247 19ms 10 Oct 2024 873rd snoozingnewt 🇨🇦 388 313 40ms 2 Nov 2025 874th fischfood 385 176 5ms 22 Oct 2024 875th JOrE20 385 191 157ms 27 Jan 2026 876th ehulinsky 🇺🇸 384 158 5ms 2 Apr 2025 877th c0d3-4-F00d 🇩🇪 384 184 2ms 9 Jan 2025 878th KatieLG 🇬🇧 375 218 118ms 21 Nov 2025 879th RobGLambert 375 232 1,411ms 8 Jun 2025 880th RedzGoose 🇦🇺 371 187 119ms 2 Oct 2024 881st P1nk-P0nk 369 215 3ms 18 Oct 2024 882nd gautambp 366 218 11ms 24 Jun 2025 883rd snoozingnewt 🇨🇦 360 267 13ms 2 Nov 2025 884th sciencejiho 359 197 2ms 11 Feb 2025 885th The-Wolfson 355 230 111ms 16 Dec 2024 886th Zhenyu-Bo 350 228 11ms 30 Jul 2025 887th EthanJantz 347 230 12ms 5 Sep 2025 888th RobGLambert 343 273 200ms 8 Jun 2025 889th Inbarw100 342 207 2ms 27 days ago 890th Ernest1338 341 275 276ms 26 Oct 2024 891st noahhorlacher 338 191 11ms 7 Dec 2024 892nd RobertBurs 337 237 11ms 22 Sep 2025 893rd TJK-S 331 241 12ms 25 Oct 2025 893rd NoneTheFewer 331 241 11ms 25 Dec 2025 895th JOrE20 314 389 56ms 4 Dec 2025 896th te-chnical 309 258 222ms 4 May 2025 897th snoozingnewt 🇨🇦 303 200 4ms 2 Nov 2025 898th KatieLG 🇬🇧 300 290 2,515ms 1 Oct 2025 899th kasarino 295 240 2ms 8 Feb 2026 900th KatieLG 🇬🇧 294 241 2ms 1 Oct 2025 First Prev 801–900 of 950 Next Last