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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input 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 ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input 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 450th CaedenHarper 🇨🇦 673 177 278ms 24 days ago 452nd tailorspy 672 128 379ms 4 Oct 2024 453rd HumanoidCPU 670 96 9ms 7 Mar 2025 454th error256 669 101 4ms 24 Oct 2024 455th MeWhenI 🇻🇦 669 174 41ms 13 Feb 2025 456th madex 🇩🇪 666 103 1ms 2 Oct 2024 457th CaedenHarper 🇨🇦 666 140 692ms 3 Oct 2025 458th dbut2 🇦🇺 666 179 264ms 31 Oct 2024 459th emgordon154 665 111 4ms 12 Jan 2025 460th two-bad 🇬🇧 664 97 10ms 2 Oct 2024 460th LordSir101 664 97 9ms 10 Aug 2025 462nd AlephSquirrel 663 146 3ms 14 May 2025 463rd snoozingnewt 🇨🇦 662 180 268ms 2 Nov 2025 464th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 465th DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 466th MeWhenI 🇻🇦 659 88 128ms 2 Oct 2024 466th Shanethegamer 🇺🇸 659 88 148ms 5 Oct 2024 468th GolfingSuccess 🇬🇷 659 98 16ms 5 Oct 2024 468th firegene 🇮🇪 659 98 18ms 21 Oct 2024 468th JunkIce 659 98 10ms 3 Dec 2024 471st BlankSpruce 659 104 2ms 1 Oct 2024 472nd BambooleanLogic 🇸🇪 657 98 9ms 21 Oct 2024 473rd error256 657 142 178ms 31 May 2025 474th jwhear 🇺🇸 655 197 1,696ms 1 Oct 2024 475th MeWhenI 🇻🇦 653 88 504ms 2 Oct 2024 476th Herbert00709 🇵🇱 653 105 2ms 14 Jun 2025 477th SirBogman 🇺🇸 652 99 16ms 8 Oct 2024 478th voytxt 🇨🇿 651 89 129ms 17 Apr 2025 478th dokutan 651 89 119ms 28 Jun 2025 480th w911 651 183 268ms 7 Oct 2024 481st albanian-laundromat 651 293 14ms 3 days ago 482nd dokutan 650 99 8ms 28 Jun 2025 483rd MeWhenI 🇻🇦 648 91 704ms 29 Aug 2025 484th rucin93 🇵🇱 648 144 185ms 28 Oct 2024 485th rniii 647 106 1ms 2 Oct 2024 485th gastropner 647 106 2ms 11 Feb 2025 487th FlorianCassayre 🇫🇷 646 100 16ms 1 Oct 2024 487th bzijlema 🇳🇱 646 100 16ms 10 Oct 2024 487th bricknellj 646 100 16ms 4 Mar 2025 490th koipondx86 645 123 2ms 8 Nov 2024 491st CaedenHarper 🇨🇦 644 100 9ms 22 Aug 2025 491st iczelia 🇩🇪 644 100 9ms 11 Oct 2025 491st Yax42 🇫🇷 644 100 9ms 14 days ago 494th Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 495th Apataras 643 145 381ms 25 Jun 2025 496th tomh1012 641 111 396ms 8 Sep 2025 497th stefangimmillaro 639 73 234ms 1 Oct 2024 498th btjones0 639 101 16ms 2 Dec 2024 499th elgan65536 639 146 195ms 2 Oct 2024 499th dokutan 639 146 382ms 18 days ago 499th luuumine 🇫🇷 639 146 245ms 15 days ago 502nd MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 503rd msbranicky 634 188 296ms 7 Jan 2025 504th annaproxy 633 102 16ms 1 Oct 2024 504th xyangst 633 102 10ms 1 Oct 2024 506th dokutan 632 91 345ms 19 Oct 2024 507th Shanethegamer 🇺🇸 631 74 230ms 16 Oct 2024 508th Florian-Mt 631 102 9ms 6 days ago 509th albanian-laundromat 631 264 444ms 3 Nov 2025 510th robin-scragg 627 103 11ms 21 Aug 2025 511th DialFrost 🇸🇬 627 304 153ms 13 Aug 2025 512th AlephSquirrel 625 40 39ms 1 Oct 2024 513th dokutan 624 127 2ms 10 Dec 2024 514th Jonatan6 🇩🇰 623 110 2ms 24 Oct 2024 514th solisolu 623 110 2ms 16 days ago 516th solisolu 621 104 9ms 26 days ago 517th codereport 🇨🇦 619 63 33ms 2 Oct 2024 518th BalaM314 619 104 9ms 4 Feb 2025 518th acollett89 619 104 9ms 15 Jul 2025 520th SirBogman 🇺🇸 618 93 384ms 23 Jul 2025 521st MarcMush 🇫🇷 617 91 737ms 8 Oct 2024 522nd Ripick 617 135 346ms 23 Mar 2025 523rd fourth-bit 615 105 19ms 1 Oct 2024 523rd jared-hughes 615 105 15ms 3 Oct 2024 523rd mattyhempstead 615 105 27ms 7 Oct 2024 First Prev 451–525 of 842 Next Last