The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Jacobi Symbol 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 401st janbehrens 🇩🇪 655 217 456ms 3 Jul 2023 402nd Sakisan 🇧🇪 654 127 9ms 12 May 2022 402nd janbehrens 🇩🇪 654 127 10ms 3 Jul 2023 404th Shanethegamer 🇺🇸 654 241 7ms 4 Oct 2024 405th Alex-x90 🇺🇸 653 170 18ms 15 Dec 2023 405th TheZwierzLF 🇵🇱 653 170 18ms 22 May 2025 407th CatsAreFluffy 653 190 79ms 30 Dec 2022 408th MeWhenI 🇻🇦 652 124 978ms 25 May 2022 409th duckyluuk 🇳🇱 650 151 460ms 19 Jun 2024 409th bizy-coder 650 151 603ms 21 days ago 411th snoozingnewt 🇨🇦 650 195 112ms 20 Nov 2025 412th olleicua 🇺🇸 649 116 39ms 19 Feb 2025 413th itsh01 649 128 9ms 4 Jul 2022 413th DialFrost 🇸🇬 649 128 10ms 14 Jan 2024 415th Shanethegamer 🇺🇸 647 125 1,208ms 11 May 2022 415th stefangimmillaro 647 125 1,021ms 15 Jul 2023 417th Shanethegamer 🇺🇸 647 135 21ms 12 May 2022 418th roavin 647 194 348ms 26 May 2022 419th Shanethegamer 🇺🇸 646 147 4ms 11 May 2022 420th SniperSmiley 🇺🇸 646 172 17ms 29 Jun 2022 420th adoxography 646 172 18ms 8 Aug 2022 420th SB-945 646 172 17ms 24 Jan 2024 423rd MichalMarsalek 🇨🇿 646 204 356ms 20 May 2022 423rd MeWhenI 🇻🇦 646 204 366ms 26 Aug 2023 425th inventshah 646 220 391ms 13 May 2022 426th MeWhenI 🇻🇦 644 189 431ms 23 Jun 2024 427th neel11235813 642 153 588ms 27 Mar 2024 428th neihousaigaai 642 173 12ms 17 May 2022 429th bac0id 642 193 459ms 29 Jun 2024 430th dmrichwa 🇺🇸 639 130 10ms 15 Jun 2022 431st m-tkach 🇺🇦 639 273 65ms 7 Feb 2023 432nd GrayJoKing 🇦🇺 638 149 5ms 20 May 2022 432nd DialFrost 🇸🇬 638 149 4ms 15 Jan 2024 434th Bonjour27891 🇻🇳 638 174 17ms 5 Jul 2022 435th croc54 635 175 17ms 8 Jan 2025 436th GrayJoKing 🇦🇺 635 268 20ms 12 days ago 437th KrausRaus 🇺🇸 634 131 10ms 12 May 2022 438th scpchicken 🇵🇼 634 247 229ms 4 Feb 2023 439th targrik 633 150 6ms 24 Jan 2025 440th annaproxy 633 198 325ms 10 May 2022 441st Shanethegamer 🇺🇸 631 137 423ms 9 May 2022 442nd MichalMarsalek 🇨🇿 631 176 10ms 20 May 2022 442nd dokutan 631 176 10ms 23 Jun 2024 442nd RaBa21 🇭🇺 631 176 16ms 19 Jul 2025 445th yzhs 🇩🇪 631 198 143ms 23 Jun 2022 446th CaedenHarper 🇨🇦 630 199 377ms 17 Oct 2025 447th bac0id 628 173 1ms 29 Jun 2024 448th fgrosshans 🇫🇷 627 177 10ms 3 Nov 2022 449th GrayJoKing 🇦🇺 626 106 3ms 20 May 2022 450th janbehrens 🇩🇪 626 138 342ms 12 May 2022 451st stefangimmillaro 625 133 10ms 19 Sep 2024 452nd janbehrens 🇩🇪 625 152 7ms 3 Jul 2023 453rd MaxElf999 624 178 18ms 27 Sep 2022 453rd za3k 624 178 10ms 14 Dec 2022 453rd jmerle 🇳🇱 624 178 18ms 11 Jul 2023 456th Ripick 624 211 376ms 18 Aug 2024 457th anter69 🇭🇺 623 121 34ms 7 Jan 2024 458th MeWhenI 🇻🇦 621 148 140ms 25 Oct 2024 459th c0d3-4-F00d 🇩🇪 621 175 2ms 23 May 2022 460th tomh1012 621 202 373ms 14 Nov 2025 461st edsrzf 🇳🇿 621 212 371ms 23 Jul 2025 462nd DialFrost 🇸🇬 621 251 2ms 26 May 2024 463rd CaedenHarper 🇨🇦 620 134 9ms 6 Nov 2025 464th KatieLG 🇬🇧 618 159 483ms 15 Jan 2024 464th commandblockguy 🇺🇸 618 159 467ms 1 Sep 2025 464th TheZwierzLF 🇵🇱 618 159 606ms 25 days ago 467th Lv0Sys 🇵🇱 617 122 56ms 11 days ago 468th Yewzir 🇧🇪 615 345 1,685ms 24 May 2024 469th snoozingnewt 🇨🇦 614 160 505ms 1 Oct 2025 470th Eilonlif 🇮🇱 613 181 10ms 15 Feb 2024 471st DialFrost 🇸🇬 612 123 51ms 1 Jun 2024 472nd IanUtley 612 188 119ms 15 Nov 2023 473rd zakariamouhid 611 136 13ms 11 May 2023 473rd gigaprofisi 🇺🇸 611 136 10ms 10 Aug 2025 475th SirBogman 🇺🇸 611 419 18ms 27 Dec 2023 476th JunkIce 610 161 529ms 3 Dec 2024 477th mbittner20 610 182 11ms 27 May 2023 477th rollershutter 610 182 10ms 4 Jul 2024 477th wh3n3v3r 🇨🇿 610 182 10ms 11 Nov 2024 480th anter69 🇭🇺 608 133 983ms 16 Feb 2023 First Prev 401–480 of 705 Next Last