The Calendar hole will go live in approximately 10 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 641st didion0 🇺🇸 804 62 28ms 11 Feb 2022 642nd Shanethegamer 🇺🇸 803 42 35ms 28 Jan 2022 642nd Natanaelel 🇸🇪 803 42 36ms 28 Dec 2022 642nd emgordon154 803 42 37ms 19 Jan 2025 645th SirBogman 🇺🇸 802 35 1,222ms 9 Jan 2024 646th emgordon154 801 93 416ms 30 May 2025 647th j-Ewan 801 112 299ms 15 Mar 2022 648th sean-niemann 🇺🇸 801 168 136ms 8 Jun 2025 649th primo-ppcg 🇹🇭 800 25 301ms 30 Sep 2022 649th fuzzylojik-golf 🇺🇸 800 25 312ms 14 Sep 2025 651st lynn 800 41 258ms 7 Mar 2021 652nd thisishowmymindworks 🇳🇴 799 60 46ms 14 Oct 2020 652nd SomeKitten 🇺🇸 799 60 12ms 21 Aug 2022 652nd CarsonChr 🇺🇸 799 60 12ms 18 Sep 2022 652nd glassala 799 60 11ms 25 Dec 2024 652nd webmiche 799 60 13ms 3 Nov 2025 657th DialFrost 🇸🇬 798 39 992ms 2 Sep 2025 658th Sp3000 🇦🇺 797 34 12ms 28 May 2021 659th Jeremy-Stafford 795 74 144ms 28 Feb 2023 660th jerrandolph 794 113 296ms 22 Oct 2023 661st m-tkach 🇺🇦 794 259 2ms 14 Jun 2022 661st UnderKoen 🇳🇱 794 259 2ms 22 Feb 2024 663rd AlephSquirrel 792 63 11ms 15 Nov 2021 663rd gigaprofisi 🇺🇸 792 63 9ms 1 Sep 2025 663rd Yax42 🇫🇷 792 63 9ms 5 Sep 2025 666th lifthrasiir 🇰🇷 791 316 3,930ms 15 Dec 2024 667th Herbert00709 🇵🇱 790 128 12ms 8 Jun 2024 668th chunes3 🇺🇸 788 52 68ms 19 Sep 2023 669th Waffle3z 786 61 180ms 24 Jul 2021 669th tomtheisen 🇺🇸 786 61 15ms 29 Jan 2023 669th fgrosshans 🇫🇷 786 61 20ms 3 May 2023 669th davidsaltacc 786 61 12ms 16 Nov 2023 673rd jared-hughes 785 30 34ms 20 Oct 2021 673rd ZakkkkAttackkkk 🇵🇭 785 30 46ms 26 Dec 2021 675th Mukundan314 785 43 42ms 16 Apr 2025 675th csharpython 785 43 31ms 24 Aug 2025 677th Steffan153 🇫🇮 784 54 5ms 29 Aug 2024 677th AlephSquirrel 784 54 5ms 3 Oct 2024 679th MeWhenI 🇻🇦 782 59 347ms 14 Jul 2024 680th DialFrost 🇸🇬 780 93 132ms 23 Mar 2025 681st billings7 🇬🇧 780 108 360ms 21 Nov 2021 681st DialFrost 🇸🇬 780 108 608ms 22 Jul 2025 683rd DialFrost 🇸🇬 780 160 1,667ms 15 Sep 2025 684th 52525rr 779 64 9ms 12 Jun 2025 684th Lv0Sys 🇵🇱 779 64 19ms 19 days ago 686th SirBogman 🇺🇸 779 78 1,258ms 4 Jan 2022 687th fuzzylojik-golf 🇺🇸 778 40 956ms 14 Sep 2025 687th snoozingnewt 🇨🇦 778 40 762ms 22 Oct 2025 689th primo-ppcg 🇹🇭 774 133 72ms 10 days ago 690th yzhs 🇩🇪 773 62 13ms 25 Oct 2020 690th lilyyy411 773 62 24ms 10 Sep 2021 690th glesnick 773 62 22ms 18 Aug 2022 690th Anthony-Williams-06 773 62 24ms 28 Nov 2022 690th willdaspit 773 62 12ms 4 Aug 2023 695th namelessiw 773 109 388ms 30 Jul 2024 696th jacobly0 🇺🇸 771 162 1,686ms 18 Sep 2025 697th varhammer 🇷🇺 769 55 5ms 20 Aug 2021 697th fuzzylojik-golf 🇺🇸 769 55 6ms 12 Aug 2025 699th anter69 🇭🇺 767 44 50ms 12 days ago 700th PatrickStephansen 🇿🇦 767 65 37ms 5 Mar 2021 701st mpldr 🇩🇪 767 117 365ms 26 Nov 2023 702nd dokutan 766 58 433ms 2 Mar 2024 702nd Herbert00709 🇵🇱 766 58 390ms 13 May 2024 702nd JunkIce 766 58 375ms 13 Mar 2025 705th KasperKivimaeki 🇫🇮 763 135 461ms 20 Nov 2025 706th Secozzi 761 63 12ms 4 Nov 2020 706th georgehulme 761 63 12ms 28 Jan 2022 706th cyxv 761 63 14ms 30 Jun 2022 706th ei14 761 63 69ms 7 May 2024 706th LostSyntax21 🇬🇧 761 63 12ms 25 Sep 2024 706th DraigRygbi 761 63 11ms 19 Dec 2024 706th Pyroan 761 63 12ms 10 Mar 2025 713th jared-hughes 757 119 3,530ms 7 Feb 2023 714th SirBogman 🇺🇸 756 61 280ms 9 Jun 2020 715th namelessiw 753 59 416ms 5 Mar 2024 715th HumanoidCPU 753 59 339ms 29 Aug 2024 715th KatieLG 🇬🇧 753 59 400ms 28 Oct 2024 718th primo-ppcg 🇹🇭 752 36 48ms 6 Dec 2020 719th ovs-code 🇩🇪 751 105 2,669ms 2 days ago 720th ordinary-slim 749 64 12ms 20 Nov 2022 First Prev 641–720 of 2,803 Next Last