The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
√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 720th cure-honey 🇯🇵 748 120 341ms 23 Jun 2021 722nd duckyluuk 🇳🇱 747 62 3,262ms 27 Oct 2024 723rd SirBogman 🇺🇸 747 138 74ms 28 May 2023 724th dokutan 746 44 2,061ms 26 Mar 2023 725th SirBogman 🇺🇸 746 113 436ms 9 Jan 2024 726th sean-niemann 🇺🇸 745 161 46ms 7 Aug 2023 727th m-tkach 🇺🇦 745 213 49ms 31 Jan 2024 728th prplz 🇦🇺 744 62 571ms 12 Jun 2020 729th emgordon154 743 61 7ms 10 Dec 2024 730th GrayJoKing 🇦🇺 742 57 13ms 17 Dec 2020 731st AlephSquirrel 741 27 310ms 24 Jul 2022 731st saito-ta 🇯🇵 741 27 97ms 26 Jul 2022 731st GrayJoKing 🇦🇺 741 27 46ms 25 Aug 2022 731st ovs-code 🇩🇪 741 27 93ms 26 Jun 2024 735th HPWiz 🇳🇿 740 69 3,989ms 18 Jan 2025 736th CaedenHarper 🇨🇦 740 114 360ms 19 Oct 2025 737th acotis 740 182 157ms 28 Jun 2025 738th michelebastione 🇮🇹 737 65 23ms 30 Jun 2019 738th trillllian 737 65 23ms 6 Sep 2020 738th munchkinduncan 737 65 23ms 17 Jan 2021 738th OllieBoyne 🇬🇧 737 65 23ms 2 Jun 2021 738th Manby 737 65 70ms 7 Jul 2021 738th cbondurant 737 65 12ms 6 Jul 2022 738th andre-de-lorde 737 65 24ms 9 Sep 2022 738th 5space 737 65 164ms 11 Sep 2022 738th trinityy-7 737 65 23ms 13 Sep 2023 738th xyangst 737 65 23ms 1 Oct 2024 738th Flekay 🇩🇪 737 65 24ms 10 Jul 2025 738th RaBa21 🇭🇺 737 65 26ms 18 Jul 2025 738th ahmetdemirag 🇨🇾 737 65 23ms 30 Jul 2025 751st dokutan 736 63 3,222ms 24 Oct 2024 751st snoozingnewt 🇨🇦 736 63 2,913ms 10 Oct 2025 753rd annaproxy 734 115 377ms 27 Oct 2023 754th cywong-amino 🇭🇰 733 68 22ms 2 Jul 2020 754th tayloia 🇬🇧 733 68 24ms 15 May 2023 756th Herbert00709 🇵🇱 731 141 77ms 25 Oct 2024 757th stefangimmillaro 727 116 430ms 18 Jul 2023 758th kohlrabi 726 66 12ms 5 Feb 2020 758th stordev 726 66 69ms 26 Feb 2021 758th lmolteno 726 66 23ms 9 Mar 2021 758th dillon-duncando 726 66 23ms 6 Dec 2021 758th NDR0216 🇹🇼 726 66 23ms 13 Feb 2023 758th quimey 726 66 11ms 6 Mar 2023 758th roupiq 🇵🇱 726 66 37ms 21 Feb 2024 758th wh3n3v3r 🇨🇿 726 66 15ms 8 Nov 2024 758th ImpressedByRocks 726 66 10ms 24 May 2025 767th Irratix 🇳🇱 726 81 125ms 1 Oct 2021 768th jared-hughes 726 142 76ms 7 Feb 2023 769th Herbert00709 🇵🇱 724 64 3,251ms 29 Oct 2024 770th MeWhenI 🇻🇦 724 103 524ms 28 Feb 2022 771st rucin93 🇵🇱 724 135 360ms 14 Nov 2025 772nd MeWhenI 🇻🇦 723 69 23ms 3 Aug 2024 773rd primo-ppcg 🇹🇭 723 73 993ms 25 Nov 2021 773rd anter69 🇭🇺 723 73 934ms 19 Apr 2024 775th LS2021 721 117 415ms 24 Nov 2023 776th emgordon154 721 166 478ms 30 Apr 2025 777th primo-ppcg 🇹🇭 720 62 3,555ms 30 Jan 2022 778th WildTooth 719 85 707ms 10 Oct 2025 779th dokutan 719 286 2ms 7 Nov 2025 780th roguh 🇬🇹 717 59 5ms 26 Jan 2024 781st CatsAreFluffy 717 82 117ms 7 Dec 2022 782nd urojony 🇵🇱 715 67 24ms 3 Jan 2021 782nd tetraxile 715 67 24ms 3 Oct 2021 782nd Nibamot 715 67 12ms 10 Dec 2021 782nd CheeseCake628 🇳🇴 715 67 87ms 9 Feb 2023 782nd GeorgeStechman 🇬🇧 715 67 46ms 6 Jan 2024 782nd RandGuy 715 67 23ms 25 Jan 2024 782nd Ralac07 🇦🇺 715 67 23ms 16 Feb 2024 782nd inverseLorentz 🇦🇺 715 67 85ms 10 Apr 2024 782nd driri85 715 67 12ms 7 Jan 2025 782nd solisolu 715 67 50ms 9 Nov 2025 792nd MeWhenI 🇻🇦 715 118 417ms 8 Dec 2022 793rd Natanaelel 🇸🇪 714 28 42ms 16 May 2025 793rd emgordon154 714 28 40ms 30 Jun 2025 795th masflam 713 46 254ms 21 Jun 2024 796th dmrichwa 🇺🇸 712 70 23ms 19 Mar 2022 796th Naruyoko 712 70 71ms 13 Aug 2023 798th Yewzir 🇧🇪 711 145 827ms 14 May 2024 799th lynn 709 63 13ms 15 Nov 2021 800th stefangimmillaro 708 190 127ms 4 Jun 2025 First Prev 721–800 of 2,783 Next Last