The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
ln 2 in all languages in bytes. 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 Bytes Time Submitted 552nd sultan 677 76 17ms 9 Mar 2024 552nd stertooy 🇧🇪 677 76 17ms 11 Jun 2024 552nd HumanoidCPU 677 76 17ms 2 Sep 2024 552nd JunkIce 677 76 18ms 1 Oct 2024 552nd xyangst 677 76 17ms 12 Oct 2024 552nd OSYCh314 🇦🇺 677 76 17ms 2 Nov 2024 552nd Unknownuserfrommars 677 76 17ms 20 Nov 2024 552nd austinleblanc 677 76 17ms 1 Mar 2025 552nd 0dyse 677 76 17ms 29 Apr 2025 552nd codewrite 🇬🇧 677 76 19ms 25 May 2025 552nd Flekay 🇩🇪 677 76 17ms 10 Jul 2025 552nd GoldStar184 677 76 19ms 17 Jul 2025 552nd Upload-and-View 🇺🇦 677 76 18ms 9 Aug 2025 552nd cthierfelder 🇲🇨 677 76 17ms 8 Sep 2025 552nd LostSyntax21 🇬🇧 677 76 18ms 9 Nov 2025 552nd Andrey2001 677 76 18ms 9 days ago 577th iczelia 🇩🇪 673 75 19ms 16 Oct 2025 578th albanian-laundromat 673 176 1,507ms 18 Oct 2025 579th CaedenHarper 🇨🇦 668 65 1,272ms 27 Sep 2025 580th willdaspit 668 77 18ms 4 Aug 2023 580th jgh713 668 77 18ms 29 Aug 2023 580th diquah 668 77 17ms 1 Nov 2023 580th cooljoseph1 668 77 17ms 24 Dec 2023 580th jameswmccarty 668 77 18ms 4 Jun 2024 580th swtchblade 668 77 18ms 15 Jul 2025 580th Voltrifrodec 🇸🇰 668 77 17ms 7 Nov 2025 587th dokutan 665 74 357ms 15 Jan 2024 588th ovs-code 🇩🇪 665 211 1,735ms 14 Sep 2025 589th tatzyr 🇯🇵 663 55 42ms 6 Feb 2025 590th rollershutter 662 58 214ms 8 Nov 2023 591st Coolbeansyeah 660 78 18ms 13 May 2024 591st codingisgreatbutiamnot 660 78 18ms 29 Jul 2024 591st piano-miles 660 78 17ms 4 May 2025 591st Zhenyu-Bo 660 78 17ms 31 Jul 2025 591st jacekwladzinski 660 78 20ms 4 Oct 2025 596th MeWhenI 🇻🇦 660 183 142ms 1 Aug 2023 597th Lydxn 🇨🇦 658 177 469ms 6 Aug 2023 597th jared-hughes 658 177 473ms 24 Sep 2025 599th rifatx 656 138 447ms 15 Jul 2024 600th m-tkach 🇺🇦 656 254 73ms 17 Dec 2023 601st eiburns 652 79 17ms 15 Sep 2023 601st Mabeloid 🇳🇴 652 79 18ms 7 Sep 2024 601st Cube14yt 652 79 23ms 19 Nov 2025 604th 4hg 🇺🇸 650 69 819ms 17 Sep 2023 605th edsrzf 🇳🇿 648 183 1,490ms 18 Jan 2025 606th msbranicky 647 76 405ms 17 Jan 2024 606th HumanoidCPU 647 76 389ms 2 Sep 2024 606th JunkIce 647 76 388ms 3 Dec 2024 609th h3ra993huskp 🇯🇵 647 180 504ms 25 days ago 610th yuchuehw 643 80 18ms 16 May 2024 610th wh3n3v3r 🇨🇿 643 80 17ms 7 Nov 2024 612th mousetail 🇳🇱 641 63 1,017ms 24 Oct 2024 613th heanyang1 640 60 286ms 29 May 2025 614th primo-ppcg 🇹🇭 636 183 450ms 1 Aug 2023 615th jstechman 635 81 74ms 25 Feb 2024 616th prestosilver 🇺🇸 635 154 22ms 22 days ago 617th Natanaelel 🇸🇪 632 38 59ms 3 Aug 2023 618th stefangimmillaro 632 191 296ms 23 Oct 2023 619th inventshah 631 155 11ms 1 Aug 2023 620th dokutan 631 938 2ms 2 Mar 2024 621st Stockoh 🇫🇷 628 82 19ms 19 Jun 2024 621st wuzekai518 628 82 2,660ms 21 Jun 2024 623rd AlephSquirrel 628 202 117ms 3 Aug 2023 624th Alex-x90 🇺🇸 627 156 7ms 24 May 2024 625th Mabeloid 🇳🇴 623 79 541ms 17 Sep 2024 626th janbehrens 🇩🇪 622 178 58ms 4 Aug 2023 627th NickTheEASDude 🇺🇸 621 65 575ms 8 Aug 2024 628th JonahEMorgan 620 83 18ms 10 Nov 2024 629th xsot 🇸🇬 619 133 463ms 2 Aug 2023 630th janbehrens 🇩🇪 619 158 7ms 4 Aug 2023 631st jared-hughes 618 59 44ms 52 mins ago 632nd Alex-x90 🇺🇸 616 180 69ms 1 Aug 2023 633rd stefangimmillaro 613 153 53ms 26 Apr 2025 634th CatsAreFluffy 611 83 619ms 5 Jan 2024 635th MeWhenI 🇻🇦 609 182 68ms 1 Aug 2023 636th SirBogman 🇺🇸 607 385 408ms 1 Aug 2023 637th OllyTDev 606 85 19ms 22 Aug 2023 637th NickTheEASDude 🇺🇸 606 85 109ms 20 Aug 2024 639th SirBogman 🇺🇸 602 156 52ms 3 Jun 2025 640th rustykitty 🇺🇸 599 86 18ms 31 Oct 2025 First Prev 561–640 of 1,730 Next Last