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 478th RDShah 871 55 9ms 10 May 2021 478th jared-hughes 871 55 9ms 2 Oct 2021 478th MichalMarsalek 🇨🇿 871 55 9ms 2 Nov 2021 478th HumanEquivalentUnit 871 55 9ms 28 Dec 2021 478th Shanethegamer 🇺🇸 871 55 9ms 28 Jan 2022 478th cooljoseph1 871 55 9ms 6 May 2022 478th LogicalJoe 871 55 9ms 19 Sep 2022 478th aiarzhantsev 871 55 9ms 14 Oct 2022 478th betaveros 871 55 9ms 1 Jan 2023 478th 5cw 🇺🇸 871 55 33ms 24 Apr 2023 478th klixel 🇨🇦 871 55 9ms 5 Jun 2023 478th jacobly0 🇺🇸 871 55 9ms 1 Sep 2023 478th wen1now 871 55 12ms 7 Nov 2023 478th namelessiw 871 55 30ms 6 Dec 2023 478th jatloe 871 55 18ms 27 Sep 2024 478th nstearns96 🇬🇧 871 55 9ms 13 Oct 2024 478th andrewjc2000 871 55 9ms 21 Oct 2024 478th cros107 🇦🇺 871 55 9ms 18 Mar 2025 478th BREMAUCY 🇫🇷 871 55 9ms 25 Jul 2025 478th piano-miles 871 55 11ms 3 Aug 2025 478th jipsong 🇩🇪 871 55 9ms 25 Aug 2025 478th FortuiteMan 🇫🇷 871 55 10ms 3 days ago 503rd GrayJoKing 🇦🇺 869 138 67ms 8 Feb 2024 504th MeWhenI 🇻🇦 868 70 1,305ms 8 Jun 2023 505th sean-niemann 🇺🇸 867 86 514ms 26 Sep 2023 505th Steffan153 🇫🇮 867 86 526ms 23 Jul 2024 507th MeWhenI 🇻🇦 865 39 53ms 6 May 2022 507th janlelis 865 39 85ms 24 Aug 2022 509th DialFrost 🇸🇬 864 40 46ms 23 Dec 2024 509th MeWhenI 🇻🇦 864 40 41ms 14 Feb 2025 509th zacjl 864 40 40ms 16 May 2025 512th marcin7Cd 864 49 5ms 31 Jan 2021 512th ovs-code 🇩🇪 864 49 5ms 11 Mar 2023 514th SirBogman 🇺🇸 864 117 19ms 28 May 2023 515th andersk 🇺🇸 860 58 19ms 21 Mar 2020 515th jared-hughes 860 58 8ms 6 Oct 2021 515th itsh01 860 58 23ms 22 Aug 2022 515th targrik 860 58 16ms 18 Feb 2025 519th AforAmpere 856 56 10ms 21 Jan 2020 519th LucasBertocchini 856 56 9ms 9 Dec 2020 519th argusdusty 🇺🇸 856 56 9ms 31 Dec 2020 519th knutae 🇳🇴 856 56 9ms 1 Nov 2021 519th jhu04 856 56 9ms 23 Sep 2022 519th fkantelberg 856 56 9ms 5 Aug 2023 519th Natanaelel 🇸🇪 856 56 9ms 2 Dec 2023 519th programjames 856 56 11ms 24 Dec 2023 519th mathisfun271 856 56 11ms 13 Feb 2024 519th croc54 856 56 9ms 3 Dec 2024 519th agreegious 856 56 86ms 16 Mar 2025 519th xiaoyiming123 856 56 9ms 24 Jul 2025 531st DialFrost 🇸🇬 854 54 283ms 19 Jul 2024 532nd FortuiteMan 🇫🇷 854 83 220ms 12 Nov 2025 533rd primo-ppcg 🇹🇭 852 90 206ms 10 Dec 2022 534th ovs-code 🇩🇪 851 62 959ms 15 Oct 2025 535th primo-ppcg 🇹🇭 850 152 273ms 22 Jan 2020 536th primo-ppcg 🇹🇭 849 106 2,214ms 6 Feb 2023 537th primo-ppcg 🇹🇭 847 159 138ms 5 Apr 2025 538th piano-miles 845 59 9ms 31 Dec 2023 538th Larento 845 59 8ms 5 Nov 2024 540th ovs-code 🇩🇪 843 40 180ms 23 Aug 2024 541st sean-niemann 🇺🇸 843 53 177ms 25 Mar 2025 542nd sean-niemann 🇺🇸 843 55 4,148ms 23 Oct 2024 543rd JayXon 🇺🇸 843 100 399ms 21 Nov 2021 543rd primo-ppcg 🇹🇭 843 100 407ms 21 Nov 2021 543rd fuzzylojik-golf 🇺🇸 843 100 395ms 13 Aug 2025 546th jslip 841 28 47ms 31 Jul 2019 546th NewDefectus 🇮🇱 841 28 34ms 28 Jan 2022 548th vezzick 841 57 9ms 5 Mar 2021 548th dsh0 841 57 53ms 7 Jun 2022 548th vishwathg 841 57 80ms 4 Feb 2023 548th AtengChen 841 57 12ms 29 Aug 2024 552nd Natanaelel 🇸🇪 840 70 145ms 6 Jul 2025 553rd bitsandbeyond 🇳🇱 839 55 396ms 5 Nov 2025 554th DialFrost 🇸🇬 839 57 137ms 3 Aug 2024 554th ovs-code 🇩🇪 839 57 138ms 3 Aug 2024 556th Shanethegamer 🇺🇸 838 53 344ms 18 Jan 2024 557th MeWhenI 🇻🇦 838 63 914ms 12 May 2023 557th emgordon154 838 63 1,082ms 17 Nov 2024 559th primo-ppcg 🇹🇭 838 121 210ms 4 Aug 2023 560th sean-niemann 🇺🇸 834 101 414ms 7 Aug 2023 First Prev 481–560 of 2,803 Next Last