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 640th JonahEMorgan 609 83 18ms 10 Nov 2024 642nd MeWhenI 🇻🇦 609 182 76ms 1 Aug 2023 643rd aksyristos 608 60 121ms 1 Aug 2023 644th SirBogman 🇺🇸 607 385 420ms 1 Aug 2023 645th SirBogman 🇺🇸 602 156 52ms 3 Jun 2025 646th MeWhenI 🇻🇦 597 235 1,689ms 7 Nov 2025 647th MeWhenI 🇻🇦 596 164 7ms 1 Aug 2023 648th OllyTDev 594 85 19ms 22 Aug 2023 648th NickTheEASDude 🇺🇸 594 85 109ms 20 Aug 2024 650th AlephSquirrel 589 57 15ms 21 Jan 2025 651st Thinkr1 589 62 86ms 18 Nov 2025 652nd CatsAreFluffy 587 86 43ms 2 Jan 2024 652nd rustykitty 🇺🇸 587 86 18ms 31 Oct 2025 654th jacobly0 🇺🇸 584 169 3,789ms 3 Sep 2023 655th davbass 🇮🇹 582 66 245ms 25 Aug 2023 656th madex 🇩🇪 582 168 12ms 21 Feb 2024 657th kmathis22 580 196 475ms 12 days ago 658th RobertHoeh 574 88 207ms 16 May 2024 659th MeWhenI 🇻🇦 572 164 47ms 29 Apr 2025 660th namelessiw 572 199 467ms 15 Nov 2025 661st dokutan 570 64 89ms 4 Oct 2024 662nd Zekaroni 568 89 17ms 29 Aug 2023 662nd CatsAreFluffy 568 89 185ms 2 Jan 2024 662nd Aquateraneal 568 89 18ms 5 Nov 2025 665th MeWhenI 🇻🇦 565 172 399ms 15 Oct 2023 666th Yewzir 🇧🇪 564 244 268ms 3 Jan 2024 667th didion0 🇺🇸 561 90 11ms 24 Feb 2025 667th CaedenHarper 🇨🇦 561 90 172ms 6 Sep 2025 669th MeWhenI 🇻🇦 560 69 40ms 1 Aug 2023 670th Mabeloid 🇳🇴 557 235 136ms 26 Oct 2025 671st MeWhenI 🇻🇦 556 224 6ms 12 Jan 2025 672nd dokutan 555 248 271ms 6 Jan 2024 673rd edsrzf 🇳🇿 553 66 119ms 25 Nov 2024 674th adamnielson42 🇺🇸 552 70 547ms 17 Nov 2023 675th DialFrost 🇸🇬 552 177 5ms 11 Nov 2024 676th dokutan 552 237 120ms 11 Jan 2024 677th dokutan 551 240 205ms 1 Jul 2025 678th CatsAreFluffy 543 89 593ms 15 Jan 2024 679th roguh 🇬🇹 543 93 17ms 9 Jan 2024 680th albanian-laundromat 541 205 2ms 25 Jun 2025 681st KaustubhDighe 537 94 17ms 3 Nov 2023 682nd CaedenHarper 🇨🇦 537 165 974ms 19 Oct 2025 683rd MeWhenI 🇻🇦 533 208 2ms 1 Aug 2023 683rd m-tkach 🇺🇦 533 208 2ms 1 Aug 2023 683rd dokutan 533 208 2ms 27 Mar 2024 686th elgan65536 532 246 121ms 11 Nov 2023 687th alexeldridge 526 96 144ms 27 Aug 2024 688th CaedenHarper 🇨🇦 518 266 275ms 4 Nov 2025 689th Yewzir 🇧🇪 515 215 2ms 18 Jan 2024 690th Schmitt-Very-Cool 515 221 1,051ms 1 Oct 2025 691st dokutan 512 236 89ms 23 Jul 2025 692nd NoneTheFewer 510 99 18ms 9 days ago 693rd janbehrens 🇩🇪 508 165 3,275ms 4 Aug 2023 694th inventshah 501 673 16ms 1 Aug 2023 695th janbehrens 🇩🇪 499 228 449ms 4 Aug 2023 696th CaedenHarper 🇨🇦 497 229 509ms 10 Oct 2025 697th MeWhenI 🇻🇦 497 263 155ms 1 Aug 2023 698th galloj 🇨🇿 492 686 84ms 14 Aug 2023 699th MeWhenI 🇻🇦 490 87 686ms 15 Sep 2025 700th dokutan 486 234 455ms 24 Sep 2025 701st SirBogman 🇺🇸 485 98 480ms 11 Aug 2023 702nd Chinay-Domitrix 🇺🇸 483 137 4,155ms 15 Apr 2025 703rd cbrt-x 482 236 795ms 15 Sep 2023 704th Code-Coder-coder 481 105 120ms 25 days ago 705th Yewzir 🇧🇪 481 259 6ms 19 Dec 2024 706th Yewzir 🇧🇪 476 233 70ms 10 Nov 2023 707th snoozingnewt 🇨🇦 474 255 188ms 27 days ago 708th MeWhenI 🇻🇦 472 140 4,016ms 2 Dec 2024 709th janbehrens 🇩🇪 472 188 348ms 4 Aug 2023 710th MeWhenI 🇻🇦 469 179 3,327ms 1 Aug 2023 711th Maximizer02 468 129 3,998ms 19 Apr 2024 712th snoozingnewt 🇨🇦 468 356 31ms 11 days ago 713th stefangimmillaro 466 83 76ms 1 Aug 2023 714th gigaprofisi 🇺🇸 464 109 17ms 2 Mar 2025 715th MeWhenI 🇻🇦 463 214 94ms 1 Aug 2023 716th dokutan 460 215 96ms 28 Mar 2024 717th dokutan 460 241 389ms 19 Aug 2024 718th Waffle3z 452 218 1ms 12 Sep 2023 719th MeWhenI 🇻🇦 451 195 3ms 12 Aug 2024 720th dokutan 448 220 1ms 3 Apr 2024 First Prev 641–720 of 1,715 Next Last