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 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 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 Erlang 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 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 Erlang 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 599th klixel 🇨🇦 543 119 10ms 9 Apr 2025 599th vhoulbreque 🇫🇷 543 119 10ms 24 hours ago 603rd eranws 541 119 9ms 23 Dec 2024 604th Sciman101 539 147 2ms 26 Mar 2025 605th TaserTheFox 🇺🇸 538 120 20ms 8 Oct 2024 605th yokasuretsu 538 120 11ms 26 Jan 2025 605th Troon 538 120 10ms 17 Feb 2025 608th BREMAUCY 🇫🇷 534 121 16ms 18 Jul 2025 609th deancureton 532 121 9ms 30 Dec 2024 610th msbranicky 532 175 162ms 13 Dec 2024 611th chartung17 529 122 10ms 24 Mar 2025 612th msbranicky 527 126 2,869ms 9 Jan 2025 613th msbranicky 525 123 15ms 3 Oct 2024 613th bobbysq 525 123 9ms 5 Oct 2024 613th wuzekai518 525 123 9ms 8 Oct 2024 616th Macweese 524 178 308ms 3 Aug 2025 617th galloj 🇨🇿 522 112 27ms 4 Oct 2024 618th NotEvenIndian 521 124 10ms 22 Oct 2024 618th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 618th CommandLeo 🇮🇹 521 124 10ms 5 Oct 2025 621st snoozingnewt 🇺🇸 519 213 119ms 19 days ago 622nd bac0id 518 180 306ms 9 Jan 2025 623rd bnic24 516 125 17ms 3 Oct 2024 623rd adoxography 516 125 10ms 22 Oct 2024 623rd lelbal 516 125 10ms 14 Oct 2025 626th sidok 515 109 275ms 13 Nov 2024 627th dokutan 512 143 128ms 19 Oct 2024 628th emgordon154 511 156 10ms 13 Dec 2024 629th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 630th yoshykai 510 183 309ms 12 Apr 2025 631st KatieLG 🇬🇧 509 140 358ms 1 Oct 2024 632nd KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 633rd CatsAreFluffy 508 127 16ms 30 Oct 2024 633rd WillowWispy 508 127 9ms 25 May 2025 635th Chinay-Domitrix 🇺🇸 507 131 3,120ms 30 Mar 2025 636th Lv0Sys 🇵🇱 504 128 18ms 15 Jun 2025 637th msbranicky 501 138 3ms 3 Oct 2024 638th snoozingnewt 🇺🇸 501 142 379ms 19 days ago 639th madex 🇩🇪 500 129 16ms 2 Oct 2024 639th RedzGoose 🇦🇺 500 129 10ms 15 Oct 2024 639th calebaitken 500 129 9ms 11 Apr 2025 639th rollershutter 500 129 16ms 2 days ago 643rd MeWhenI 🇻🇦 499 149 42ms 4 Oct 2024 644th janAkali 🇷🇺 499 167 335ms 8 Oct 2024 645th jlangvand 498 141 1ms 15 Oct 2024 645th HumanoidCPU 498 141 2ms 7 Mar 2025 647th Europe2048 497 130 10ms 2 Oct 2024 647th nstearns96 🇬🇧 497 130 16ms 2 Oct 2024 647th Stockoh 🇫🇷 497 130 16ms 4 Jul 2025 650th inverseLorentz 🇦🇺 493 131 9ms 7 Oct 2024 650th sciencejiho 493 131 16ms 11 Feb 2025 650th Jaydosu 493 131 9ms 11 Apr 2025 650th Emutis 🇱🇹 493 131 10ms 10 days ago 654th StronkCheese2 493 161 2ms 3 days ago 655th TheRealOhead 🇺🇸 491 131 13ms 1 Oct 2024 656th HumanoidCPU 491 145 388ms 5 Oct 2024 657th snoozingnewt 🇺🇸 488 150 135ms 19 days ago 658th snoozingnewt 🇺🇸 486 117 940ms 19 days ago 659th Mabeloid 🇳🇴 485 133 10ms 2 Oct 2024 660th h-hh-hhh 🇺🇦 485 177 58ms 2 Nov 2024 661st snoozingnewt 🇺🇸 483 249 27ms 19 days ago 662nd snoozingnewt 🇺🇸 482 173 353ms 19 days ago 663rd alphafalfa 480 92 2ms 8 Nov 2024 664th KatieLG 🇬🇧 479 120 585ms 1 Oct 2024 665th ravnskjaer 🇩🇰 478 195 306ms 20 Dec 2024 665th snoozingnewt 🇺🇸 478 195 370ms 19 days ago 667th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 668th mitzal 477 180 58ms 9 Feb 2025 669th sciencedjinn 475 136 9ms 8 Nov 2024 669th ihatethefrench 475 136 17ms 4 Jan 2025 671st MiffOttah 475 150 369ms 6 Oct 2024 672nd kurkale6ka 471 137 21ms 16 Oct 2024 672nd 4ndyJ 🇬🇧 471 137 10ms 14 Nov 2024 672nd Mikey-Beep 🇬🇧 471 137 16ms 6 Aug 2025 672nd wobblybits 471 137 17ms 17 Aug 2025 First Prev 601–675 of 819 Next Last