The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
ln 2 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 561st stefangimmillaro 688 190 141ms 4 Jun 2025 562nd dokutan 685 284 2ms 7 Nov 2025 563rd clemmers 🇺🇸 674 75 18ms 1 Aug 2023 563rd aksyristos 674 75 18ms 1 Aug 2023 563rd bac0id 674 75 17ms 20 Sep 2023 566th iczelia 🇩🇪 673 75 19ms 16 Oct 2025 567th albanian-laundromat 673 176 1,507ms 18 Oct 2025 568th msbranicky 665 76 17ms 3 Aug 2023 568th StHagel 665 76 17ms 3 Aug 2023 568th SniperSmiley 🇺🇸 665 76 18ms 15 Aug 2023 568th RYNO8 665 76 20ms 20 Aug 2023 568th epic-programmer-guy 665 76 17ms 31 Dec 2023 568th Just4FunCoder 665 76 17ms 26 Feb 2024 568th sultan 665 76 17ms 9 Mar 2024 568th stertooy 🇧🇪 665 76 17ms 11 Jun 2024 568th xyangst 665 76 17ms 12 Oct 2024 568th OSYCh314 🇦🇺 665 76 17ms 2 Nov 2024 568th Unknownuserfrommars 665 76 17ms 20 Nov 2024 568th austinleblanc 665 76 17ms 1 Mar 2025 568th 0dyse 665 76 17ms 29 Apr 2025 568th codewrite 🇬🇧 665 76 19ms 25 May 2025 568th Flekay 🇩🇪 665 76 17ms 10 Jul 2025 568th GoldStar184 665 76 19ms 17 Jul 2025 568th Upload-and-View 🇺🇦 665 76 18ms 9 Aug 2025 568th cthierfelder 🇲🇨 665 76 17ms 8 Sep 2025 568th LostSyntax21 🇬🇧 665 76 18ms 9 Nov 2025 568th Andrey2001 665 76 18ms 3 days ago 588th ovs-code 🇩🇪 665 211 1,735ms 14 Sep 2025 589th BREMAUCY 🇫🇷 664 55 96ms 11 Sep 2023 589th tatzyr 🇯🇵 664 55 121ms 6 Feb 2025 591st rollershutter 662 58 214ms 8 Nov 2023 592nd MeWhenI 🇻🇦 660 183 142ms 1 Aug 2023 593rd willdaspit 656 77 18ms 4 Aug 2023 593rd jgh713 656 77 18ms 29 Aug 2023 593rd diquah 656 77 17ms 1 Nov 2023 593rd cooljoseph1 656 77 17ms 24 Dec 2023 593rd jameswmccarty 656 77 18ms 4 Jun 2024 593rd swtchblade 656 77 18ms 15 Jul 2025 593rd Voltrifrodec 🇸🇰 656 77 17ms 7 Nov 2025 600th m-tkach 🇺🇦 656 254 73ms 17 Dec 2023 601st CaedenHarper 🇨🇦 655 65 1,272ms 27 Sep 2025 602nd 4hg 🇺🇸 650 69 819ms 17 Sep 2023 603rd Coolbeansyeah 648 78 18ms 13 May 2024 603rd codingisgreatbutiamnot 648 78 18ms 29 Jul 2024 603rd piano-miles 648 78 17ms 4 May 2025 603rd Zhenyu-Bo 648 78 17ms 31 Jul 2025 603rd jacekwladzinski 648 78 20ms 4 Oct 2025 608th edsrzf 🇳🇿 648 183 2,335ms 18 Jan 2025 609th Lydxn 🇨🇦 646 176 469ms 6 Aug 2023 610th mousetail 🇳🇱 644 60 1,017ms 24 Oct 2024 611th jared-hughes 643 177 473ms 24 Sep 2025 612th rifatx 642 138 447ms 15 Jul 2024 613th heanyang1 640 60 321ms 29 May 2025 614th eiburns 640 79 17ms 15 Sep 2023 614th Mabeloid 🇳🇴 640 79 18ms 7 Sep 2024 614th Cube14yt 640 79 23ms 19 Nov 2025 617th msbranicky 636 76 405ms 17 Jan 2024 618th prestosilver 🇺🇸 635 154 22ms 16 days ago 619th Natanaelel 🇸🇪 632 38 73ms 3 Aug 2023 620th yuchuehw 632 80 18ms 16 May 2024 620th RaBa21 🇭🇺 632 80 73ms 18 Jul 2025 622nd h3ra993huskp 🇯🇵 632 180 504ms 18 days ago 623rd stefangimmillaro 632 191 296ms 23 Oct 2023 624th inventshah 631 155 11ms 1 Aug 2023 625th primo-ppcg 🇹🇭 629 181 534ms 2 Aug 2023 626th AlephSquirrel 628 202 117ms 3 Aug 2023 627th Alex-x90 🇺🇸 627 156 7ms 24 May 2024 628th jstechman 624 81 74ms 25 Feb 2024 628th robin-scragg 624 81 476ms 28 Sep 2025 630th janbehrens 🇩🇪 622 178 58ms 4 Aug 2023 631st jared-hughes 619 59 102ms 1 Aug 2023 632nd xsot 🇸🇬 619 133 463ms 2 Aug 2023 633rd janbehrens 🇩🇪 619 158 7ms 4 Aug 2023 634th Stockoh 🇫🇷 616 82 19ms 19 Jun 2024 634th wuzekai518 616 82 2,660ms 21 Jun 2024 636th Alex-x90 🇺🇸 616 180 77ms 1 Aug 2023 637th NickTheEASDude 🇺🇸 614 63 575ms 8 Aug 2024 638th stefangimmillaro 613 153 53ms 26 Apr 2025 639th Mabeloid 🇳🇴 611 79 541ms 17 Sep 2024 640th roupiq 🇵🇱 609 83 672ms 18 Apr 2024 First Prev 561–640 of 1,715 Next Last