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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Chars Time 600th WillowWispy 508 127 25 May 2025 602nd Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 603rd msbranicky 507 138 3 Oct 2024 604th KatieLG 🇬🇧 506 140 1 Oct 2024 605th yoshykai 506 183 12 Apr 2025 606th lelbal 504 128 2 Oct 2024 606th Lv0Sys 🇵🇱 504 128 15 Jun 2025 608th albanian-laundromat 501 88 2 Jul 2025 609th madex 🇩🇪 500 129 2 Oct 2024 609th RedzGoose 🇦🇺 500 129 15 Oct 2024 609th calebaitken 500 129 11 Apr 2025 612th MeWhenI 🇻🇦 499 149 4 Oct 2024 613th jlangvand 497 141 15 Oct 2024 613th HumanoidCPU 497 141 7 Mar 2025 615th janAkali 🇷🇺 497 167 8 Oct 2024 616th Europe2048 496 130 2 Oct 2024 616th nstearns96 🇬🇧 496 130 2 Oct 2024 616th rollershutter 496 130 10 Jan 2025 616th Stockoh 🇫🇷 496 130 4 Jul 2025 616th solisolu 496 130 16 hours ago 621st inverseLorentz 🇦🇺 493 131 7 Oct 2024 621st sciencejiho 493 131 11 Feb 2025 621st Jaydosu 493 131 11 Apr 2025 624th TheRealOhead 🇺🇸 491 131 1 Oct 2024 625th HumanoidCPU 489 145 5 Oct 2024 626th Mabeloid 🇳🇴 485 133 2 Oct 2024 626th Emutis 🇱🇹 485 133 4 Feb 2025 628th h-hh-hhh 🇺🇦 485 177 2 Nov 2024 629th Mabeloid 🇳🇴 484 145 2 Oct 2024 630th alphafalfa 479 92 8 Nov 2024 631st KatieLG 🇬🇧 478 120 1 Oct 2024 632nd h-hh-hhh 🇺🇦 477 147 2 Nov 2024 633rd mitzal 477 180 9 Feb 2025 634th ravnskjaer 🇩🇰 475 195 20 Dec 2024 635th sciencedjinn 474 136 8 Nov 2024 635th ihatethefrench 474 136 4 Jan 2025 637th MiffOttah 473 150 6 Oct 2024 638th kurkale6ka 471 137 16 Oct 2024 638th 4ndyJ 🇬🇧 471 137 14 Nov 2024 638th Mikey-Beep 🇬🇧 471 137 6 Aug 2025 638th wobblybits 471 137 17 Aug 2025 642nd iczelia 🇩🇪 469 94 10 days ago 643rd ejini6969 468 102 14 Jun 2025 644th luca1339 467 198 4 Nov 2024 645th scpchicken 🇵🇼 464 139 6 Oct 2024 646th NanduBC 461 140 1 Oct 2024 646th jmerle 🇳🇱 461 140 10 Jan 2025 646th RobertHoeh 461 140 3 Mar 2025 646th smilesformiles3 461 140 12 Jun 2025 646th artem-aramma 461 140 18 Jun 2025 651st Yewzir 🇧🇪 460 171 26 Dec 2024 652nd madex 🇩🇪 459 104 2 Oct 2024 653rd FranklinJiaChen 458 141 2 Oct 2024 654th Jacob385 458 202 2 Oct 2024 655th brimstonetrader 454 142 17 Oct 2024 655th codewrite 🇬🇧 454 142 5 May 2025 655th RobGLambert 454 142 8 Jun 2025 658th dokutan 451 63 26 Nov 2024 659th GeneralFabian 451 143 9 Dec 2024 659th CutSandstone 451 143 30 Jan 2025 659th kistlerf 🇨🇭 451 143 19 May 2025 662nd IISResetMe 449 104 27 Mar 2025 663rd hiichbindermax 448 144 2 Oct 2024 663rd mathisfun271 448 144 14 Oct 2024 663rd bob-th 448 144 22 Oct 2024 666th varhammer 🇷🇺 448 223 23 Feb 2025 667th dokutan 445 109 19 Oct 2024 668th Flekay 🇩🇪 445 145 10 Jul 2025 669th grey0ut 444 105 11 Jan 2025 670th croc54 442 146 15 Dec 2024 671st MyXoToD 🇩🇪 440 146 26 May 2025 672nd PyryL 🇫🇮 439 147 1 Mar 2025 673rd mbittner20 436 148 13 Oct 2024 674th psaban 433 149 31 Jul 2025 675th KatieLG 🇬🇧 432 183 33 hours ago First Prev 601–675 of 764 Next Last