Card Number Validation in all languages in chars. 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 481st jerrandolph 673 177 295ms 25 Sep 2025 481st CaedenHarper 🇨🇦 673 177 318ms 17 Nov 2025 483rd HumanoidCPU 671 96 10ms 7 Mar 2025 484th error256 671 101 5ms 24 Oct 2024 485th emgordon154 670 115 112ms 9 Dec 2025 486th Shanethegamer 🇺🇸 668 65 1ms 1 Oct 2024 487th madex 🇩🇪 668 103 1ms 2 Oct 2024 488th CaedenHarper 🇨🇦 667 140 571ms 3 Oct 2025 489th dbut2 🇦🇺 666 179 284ms 31 Oct 2024 490th two-bad 🇬🇧 664 97 9ms 2 Oct 2024 490th LordSir101 664 97 10ms 10 Aug 2025 492nd yeminghan2021 663 131 60ms 3 Feb 2026 493rd Shanethegamer 🇺🇸 663 172 39ms 2 Oct 2024 494th BlankSpruce 662 104 2ms 1 Oct 2024 495th snoozingnewt 🇨🇦 662 180 338ms 2 Nov 2025 496th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 497th MeWhenI 🇻🇦 660 88 131ms 2 Oct 2024 497th Shanethegamer 🇺🇸 660 88 154ms 5 Oct 2024 499th GolfingSuccess 🇬🇷 660 98 17ms 5 Oct 2024 499th JunkIce 660 98 10ms 3 Dec 2024 501st BambooleanLogic 🇸🇪 657 98 9ms 21 Oct 2024 502nd error256 657 142 164ms 31 May 2025 503rd AlephSquirrel 657 146 4ms 14 May 2025 504th Herbert00709 🇵🇱 656 105 2ms 14 Jun 2025 505th MeWhenI 🇻🇦 655 174 41ms 13 Feb 2025 506th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 507th MeWhenI 🇻🇦 654 88 440ms 2 Oct 2024 508th voytxt 🇨🇿 653 89 143ms 17 Apr 2025 508th dokutan 653 89 118ms 28 Jun 2025 510th SirBogman 🇺🇸 653 99 16ms 8 Oct 2024 511th dokutan 651 99 9ms 28 Jun 2025 512th w911 651 183 281ms 7 Oct 2024 513th albanian-laundromat 651 293 14ms 8 Dec 2025 514th emgordon154 650 111 4ms 12 Jan 2025 515th rniii 649 106 1ms 2 Oct 2024 515th gastropner 649 106 2ms 11 Feb 2025 515th solisolu 649 106 2ms 20 days ago 518th DialFrost 🇸🇬 648 67 2ms 22 Dec 2024 519th rucin93 🇵🇱 648 144 164ms 28 Oct 2024 520th FlorianCassayre 🇫🇷 646 100 17ms 1 Oct 2024 520th bzijlema 🇳🇱 646 100 18ms 10 Oct 2024 520th bricknellj 646 100 17ms 4 Mar 2025 523rd koipondx86 645 123 2ms 8 Nov 2024 524th frankgraziano 645 128 9ms 12 days ago 525th CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 525th iczelia 🇩🇪 644 100 9ms 11 Oct 2025 525th Yax42 🇫🇷 644 100 10ms 27 Nov 2025 528th Apataras 644 145 390ms 25 Jun 2025 529th tomh1012 643 111 539ms 8 Sep 2025 530th Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 531st btjones0 640 101 17ms 2 Dec 2024 532nd dokutan 640 146 379ms 23 Nov 2025 533rd stefangimmillaro 639 73 306ms 1 Oct 2024 534th dokutan 639 90 395ms 19 days ago 535th elgan65536 🇺🇸 639 146 169ms 2 Oct 2024 535th luuumine 🇫🇷 639 146 159ms 26 Nov 2025 537th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 538th MeWhenI 🇻🇦 634 91 994ms 29 Aug 2025 539th annaproxy 634 102 17ms 1 Oct 2024 539th xyangst 634 102 11ms 1 Oct 2024 539th solisolu 634 102 10ms 31 Dec 2025 542nd msbranicky 634 188 301ms 7 Jan 2025 543rd Shanethegamer 🇺🇸 631 74 285ms 16 Oct 2024 544th Florian-Mt 631 102 9ms 5 Dec 2025 545th albanian-laundromat 631 264 1,512ms 3 Nov 2025 546th robin-scragg 627 103 11ms 21 Aug 2025 547th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 548th Jonatan6 🇩🇰 626 110 2ms 24 Oct 2024 549th AlephSquirrel 625 40 43ms 1 Oct 2024 550th dokutan 624 127 2ms 10 Dec 2024 551st Yax42 🇫🇷 620 111 2ms 9 Jan 2026 552nd codereport 🇨🇦 619 63 33ms 2 Oct 2024 553rd SirBogman 🇺🇸 619 93 503ms 23 Jul 2025 554th BalaM314 619 104 10ms 4 Feb 2025 554th acollett89 619 104 9ms 15 Jul 2025 556th MarcMush 🇫🇷 617 91 813ms 8 Oct 2024 557th Ripick 617 135 366ms 23 Mar 2025 558th fourth-bit 616 105 17ms 1 Oct 2024 558th jared-hughes 616 105 16ms 3 Oct 2024 558th mattyhempstead 616 105 26ms 7 Oct 2024 First Prev 481–560 of 901 Next Last