Card Number Validation in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 524th ahmetdemirag 🇨🇾 546 118 6 Feb 2025 527th mousetail 🇳🇱 546 128 3 Oct 2024 528th zakariamouhid 544 118 1 Oct 2024 529th xyangst 543 171 1 Oct 2024 530th jtaxen 541 119 21 Oct 2024 530th psbpsbp 541 119 19 Dec 2024 530th klixel 🇨🇦 541 119 9 Apr 2025 533rd najs91 540 131 15 Oct 2024 533rd bac0id 540 131 9 Jan 2025 535th eranws 539 119 23 Dec 2024 536th TaserTheFox 🇺🇸 537 120 8 Oct 2024 536th yokasuretsu 537 120 26 Jan 2025 536th Troon 537 120 17 Feb 2025 539th Sciman101 536 147 26 Mar 2025 540th msbranicky 531 175 13 Dec 2024 541st deancureton 530 121 30 Dec 2024 542nd janAkali 🇷🇺 529 167 8 Oct 2024 543rd chartung17 528 122 24 Mar 2025 544th msbranicky 527 126 9 Jan 2025 545th CaedenHarper 🇨🇦 524 109 9 Oct 2024 546th msbranicky 523 123 3 Oct 2024 546th bobbysq 523 123 5 Oct 2024 546th wuzekai518 523 123 8 Oct 2024 546th vhoulbreque 🇫🇷 523 123 4 Feb 2025 550th galloj 🇨🇿 522 112 4 Oct 2024 551st NotEvenIndian 519 124 22 Oct 2024 551st ridingqwerty 🇺🇸 519 124 16 Jan 2025 553rd bnic24 515 125 3 Oct 2024 553rd adoxography 515 125 22 Oct 2024 555th sidok 514 109 13 Nov 2024 556th nephila-nacrea 🇬🇧 509 77 2 Oct 2024 557th dokutan 509 143 19 Oct 2024 558th KatieLG 🇬🇧 509 146 2 Oct 2024 559th CatsAreFluffy 507 127 30 Oct 2024 559th WillowWispy 507 127 25 May 2025 561st Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 562nd KatieLG 🇬🇧 506 140 1 Oct 2024 563rd msbranicky 505 138 3 Oct 2024 564th lelbal 503 128 2 Oct 2024 564th Lv0Sys 🇵🇱 503 128 15 days ago 566th madex 🇩🇪 499 129 2 Oct 2024 566th RedzGoose 🇦🇺 499 129 15 Oct 2024 566th calebaitken 499 129 11 Apr 2025 569th MeWhenI 🇻🇦 499 149 4 Oct 2024 570th jlangvand 496 141 15 Oct 2024 570th HumanoidCPU 496 141 7 Mar 2025 572nd Europe2048 495 130 2 Oct 2024 572nd nstearns96 🇬🇧 495 130 2 Oct 2024 572nd rollershutter 495 130 10 Jan 2025 575th Stockoh 🇫🇷 492 131 2 Oct 2024 575th inverseLorentz 🇦🇺 492 131 7 Oct 2024 575th sciencejiho 492 131 11 Feb 2025 575th Jaydosu 492 131 11 Apr 2025 579th TheRealOhead 🇺🇸 490 131 1 Oct 2024 580th HumanoidCPU 488 145 5 Oct 2024 581st Mabeloid 🇳🇴 484 133 2 Oct 2024 581st Emutis 🇱🇹 484 133 4 Feb 2025 583rd h-hh-hhh 🇺🇦 484 177 2 Nov 2024 584th Mabeloid 🇳🇴 482 145 2 Oct 2024 585th alphafalfa 476 92 8 Nov 2024 586th KatieLG 🇬🇧 476 108 13 Oct 2024 587th KatieLG 🇬🇧 476 120 1 Oct 2024 588th h-hh-hhh 🇺🇦 476 147 2 Nov 2024 589th mitzal 476 180 9 Feb 2025 590th sciencedjinn 473 136 8 Nov 2024 590th ihatethefrench 473 136 4 Jan 2025 592nd MiffOttah 472 150 6 Oct 2024 593rd Maximizer02 472 201 1 Oct 2024 594th kurkale6ka 470 137 16 Oct 2024 594th 4ndyJ 🇬🇧 470 137 14 Nov 2024 596th ejini6969 467 102 17 days ago 597th BREMAUCY 🇫🇷 467 138 2 Oct 2024 598th scpchicken 🇵🇼 463 139 6 Oct 2024 599th varhammer 🇷🇺 463 223 23 Feb 2025 600th NanduBC 460 140 1 Oct 2024 Prev 526–600 of 695 Next