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 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 554th zwxzwxzwx21 677 76 18ms 16 Jan 2024 554th Just4FunCoder 677 76 17ms 26 Feb 2024 554th sultan 677 76 17ms 9 Mar 2024 554th stertooy 🇧🇪 677 76 17ms 11 Jun 2024 554th HumanoidCPU 677 76 17ms 2 Sep 2024 554th JunkIce 677 76 18ms 1 Oct 2024 554th xyangst 677 76 17ms 12 Oct 2024 554th OSYCh314 🇦🇺 677 76 17ms 2 Nov 2024 554th Unknownuserfrommars 677 76 17ms 20 Nov 2024 554th austinleblanc 677 76 17ms 1 Mar 2025 554th 0dyse 677 76 17ms 29 Apr 2025 554th codewrite 🇬🇧 677 76 19ms 25 May 2025 554th Flekay 🇩🇪 677 76 17ms 10 Jul 2025 554th GoldStar184 677 76 19ms 17 Jul 2025 554th Upload-and-View 🇺🇦 677 76 18ms 9 Aug 2025 554th cthierfelder 🇲🇨 677 76 17ms 8 Sep 2025 554th LostSyntax21 🇬🇧 677 76 18ms 9 Nov 2025 554th Andrey2001 677 76 18ms 2 days ago 579th iczelia 🇩🇪 673 75 19ms 16 Oct 2025 580th albanian-laundromat 673 176 1,507ms 18 Oct 2025 581st CaedenHarper 🇨🇦 668 65 1,272ms 27 Sep 2025 582nd willdaspit 668 77 18ms 4 Aug 2023 582nd jgh713 668 77 18ms 29 Aug 2023 582nd diquah 668 77 17ms 1 Nov 2023 582nd cooljoseph1 668 77 17ms 24 Dec 2023 582nd jameswmccarty 668 77 18ms 4 Jun 2024 582nd swtchblade 668 77 18ms 15 Jul 2025 582nd Voltrifrodec 🇸🇰 668 77 17ms 7 Nov 2025 589th dokutan 665 74 357ms 15 Jan 2024 590th ovs-code 🇩🇪 665 211 1,735ms 14 Sep 2025 591st BREMAUCY 🇫🇷 664 55 96ms 11 Sep 2023 591st tatzyr 🇯🇵 664 55 121ms 6 Feb 2025 593rd rollershutter 662 58 214ms 8 Nov 2023 594th Coolbeansyeah 660 78 18ms 13 May 2024 594th codingisgreatbutiamnot 660 78 18ms 29 Jul 2024 594th piano-miles 660 78 17ms 4 May 2025 594th Zhenyu-Bo 660 78 17ms 31 Jul 2025 594th jacekwladzinski 660 78 20ms 4 Oct 2025 599th MeWhenI 🇻🇦 660 183 142ms 1 Aug 2023 600th Lydxn 🇨🇦 658 177 469ms 6 Aug 2023 600th jared-hughes 658 177 473ms 24 Sep 2025 602nd m-tkach 🇺🇦 656 254 73ms 17 Dec 2023 603rd rifatx 655 138 447ms 15 Jul 2024 604th eiburns 652 79 17ms 15 Sep 2023 604th Mabeloid 🇳🇴 652 79 18ms 7 Sep 2024 604th Cube14yt 652 79 23ms 19 Nov 2025 607th 4hg 🇺🇸 650 69 819ms 17 Sep 2023 608th edsrzf 🇳🇿 648 183 2,335ms 18 Jan 2025 609th msbranicky 647 76 405ms 17 Jan 2024 609th HumanoidCPU 647 76 389ms 2 Sep 2024 609th JunkIce 647 76 388ms 3 Dec 2024 612th h3ra993huskp 🇯🇵 647 180 504ms 18 days ago 613th yuchuehw 643 80 18ms 16 May 2024 613th wh3n3v3r 🇨🇿 643 80 17ms 7 Nov 2024 615th mousetail 🇳🇱 641 63 1,017ms 24 Oct 2024 616th heanyang1 640 60 321ms 29 May 2025 617th primo-ppcg 🇹🇭 636 183 450ms 1 Aug 2023 618th jstechman 635 81 74ms 25 Feb 2024 619th prestosilver 🇺🇸 635 154 22ms 15 days ago 620th Natanaelel 🇸🇪 632 38 73ms 3 Aug 2023 621st stefangimmillaro 632 191 296ms 23 Oct 2023 622nd inventshah 631 155 11ms 1 Aug 2023 623rd dokutan 631 938 2ms 2 Mar 2024 624th Stockoh 🇫🇷 628 82 19ms 19 Jun 2024 624th wuzekai518 628 82 2,660ms 21 Jun 2024 626th AlephSquirrel 628 202 117ms 3 Aug 2023 627th Alex-x90 🇺🇸 627 156 7ms 24 May 2024 628th Mabeloid 🇳🇴 623 79 541ms 17 Sep 2024 629th janbehrens 🇩🇪 622 178 58ms 4 Aug 2023 630th NickTheEASDude 🇺🇸 621 65 575ms 8 Aug 2024 631st JonahEMorgan 620 83 18ms 10 Nov 2024 632nd jared-hughes 619 59 102ms 1 Aug 2023 633rd xsot 🇸🇬 619 133 463ms 2 Aug 2023 634th janbehrens 🇩🇪 619 158 7ms 4 Aug 2023 635th Alex-x90 🇺🇸 616 180 77ms 1 Aug 2023 636th stefangimmillaro 613 153 53ms 26 Apr 2025 637th CatsAreFluffy 611 83 619ms 5 Jan 2024 638th MeWhenI 🇻🇦 609 182 76ms 1 Aug 2023 639th aksyristos 608 60 121ms 1 Aug 2023 640th SirBogman 🇺🇸 607 385 420ms 1 Aug 2023 First Prev 561–640 of 1,733 Next Last