The Calendar hole will go live in approximately 7 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 clemmers 🇺🇸 674 75 18ms 1 Aug 2023 561st aksyristos 674 75 18ms 1 Aug 2023 561st bac0id 674 75 17ms 20 Sep 2023 564th iczelia 🇩🇪 673 75 19ms 16 Oct 2025 565th albanian-laundromat 673 176 1,507ms 18 Oct 2025 566th msbranicky 665 76 17ms 3 Aug 2023 566th StHagel 665 76 17ms 3 Aug 2023 566th SniperSmiley 🇺🇸 665 76 18ms 15 Aug 2023 566th RYNO8 665 76 20ms 20 Aug 2023 566th epic-programmer-guy 665 76 17ms 31 Dec 2023 566th Just4FunCoder 665 76 17ms 26 Feb 2024 566th sultan 665 76 17ms 9 Mar 2024 566th stertooy 🇧🇪 665 76 17ms 11 Jun 2024 566th xyangst 665 76 17ms 12 Oct 2024 566th OSYCh314 🇦🇺 665 76 17ms 2 Nov 2024 566th Unknownuserfrommars 665 76 17ms 20 Nov 2024 566th austinleblanc 665 76 17ms 1 Mar 2025 566th 0dyse 665 76 17ms 29 Apr 2025 566th codewrite 🇬🇧 665 76 19ms 25 May 2025 566th Flekay 🇩🇪 665 76 17ms 10 Jul 2025 566th GoldStar184 665 76 19ms 17 Jul 2025 566th Upload-and-View 🇺🇦 665 76 18ms 9 Aug 2025 566th cthierfelder 🇲🇨 665 76 17ms 8 Sep 2025 566th LostSyntax21 🇬🇧 665 76 18ms 9 Nov 2025 566th Andrey2001 665 76 18ms 8 days ago 586th ovs-code 🇩🇪 665 211 1,735ms 14 Sep 2025 587th BREMAUCY 🇫🇷 664 55 87ms 11 Sep 2023 587th tatzyr 🇯🇵 664 55 91ms 6 Feb 2025 589th rollershutter 662 58 214ms 8 Nov 2023 590th MeWhenI 🇻🇦 660 183 142ms 1 Aug 2023 591st willdaspit 656 77 18ms 4 Aug 2023 591st jgh713 656 77 18ms 29 Aug 2023 591st diquah 656 77 17ms 1 Nov 2023 591st cooljoseph1 656 77 17ms 24 Dec 2023 591st jameswmccarty 656 77 18ms 4 Jun 2024 591st swtchblade 656 77 18ms 15 Jul 2025 591st Voltrifrodec 🇸🇰 656 77 17ms 7 Nov 2025 598th m-tkach 🇺🇦 656 254 73ms 17 Dec 2023 599th CaedenHarper 🇨🇦 655 65 1,272ms 27 Sep 2025 600th 4hg 🇺🇸 650 69 819ms 17 Sep 2023 601st Coolbeansyeah 648 78 18ms 13 May 2024 601st codingisgreatbutiamnot 648 78 18ms 29 Jul 2024 601st piano-miles 648 78 17ms 4 May 2025 601st Zhenyu-Bo 648 78 17ms 31 Jul 2025 601st jacekwladzinski 648 78 20ms 4 Oct 2025 606th edsrzf 🇳🇿 648 183 2,335ms 18 Jan 2025 607th Lydxn 🇨🇦 646 176 469ms 6 Aug 2023 608th mousetail 🇳🇱 644 60 1,017ms 24 Oct 2024 609th rifatx 644 138 447ms 15 Jul 2024 610th jared-hughes 643 177 473ms 24 Sep 2025 611th heanyang1 640 60 286ms 29 May 2025 612th eiburns 640 79 17ms 15 Sep 2023 612th Mabeloid 🇳🇴 640 79 18ms 7 Sep 2024 612th Cube14yt 640 79 23ms 19 Nov 2025 615th msbranicky 636 76 405ms 17 Jan 2024 616th prestosilver 🇺🇸 635 154 22ms 21 days ago 617th Natanaelel 🇸🇪 632 38 60ms 3 Aug 2023 618th yuchuehw 632 80 18ms 16 May 2024 618th RaBa21 🇭🇺 632 80 73ms 18 Jul 2025 620th h3ra993huskp 🇯🇵 632 180 504ms 24 days ago 621st stefangimmillaro 632 191 296ms 23 Oct 2023 622nd inventshah 631 155 11ms 1 Aug 2023 623rd primo-ppcg 🇹🇭 629 181 534ms 2 Aug 2023 624th AlephSquirrel 628 202 117ms 3 Aug 2023 625th Alex-x90 🇺🇸 627 156 7ms 24 May 2024 626th jstechman 624 81 74ms 25 Feb 2024 626th robin-scragg 624 81 476ms 28 Sep 2025 628th janbehrens 🇩🇪 622 178 58ms 4 Aug 2023 629th jared-hughes 619 59 85ms 1 Aug 2023 630th xsot 🇸🇬 619 133 463ms 2 Aug 2023 631st janbehrens 🇩🇪 619 158 7ms 4 Aug 2023 632nd Stockoh 🇫🇷 616 82 19ms 19 Jun 2024 632nd wuzekai518 616 82 2,660ms 21 Jun 2024 634th Alex-x90 🇺🇸 616 180 69ms 1 Aug 2023 635th NickTheEASDude 🇺🇸 614 63 575ms 8 Aug 2024 636th stefangimmillaro 613 153 53ms 26 Apr 2025 637th Mabeloid 🇳🇴 611 79 541ms 17 Sep 2024 638th roupiq 🇵🇱 609 83 672ms 18 Apr 2024 638th JonahEMorgan 609 83 18ms 10 Nov 2024 640th MeWhenI 🇻🇦 609 182 68ms 1 Aug 2023 First Prev 561–640 of 1,716 Next Last