The Calendar hole will go live in approximately 10 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 481st anter69 🇭🇺 608 133 983ms 16 Feb 2023 482nd voytxt 🇨🇿 607 137 10ms 9 May 2022 482nd KatieLG 🇬🇧 607 137 10ms 24 Oct 2022 484th SirBogman 🇺🇸 607 235 1,296ms 26 May 2022 485th MeWhenI 🇻🇦 606 66 55ms 30 Jul 2025 486th MeWhenI 🇻🇦 606 165 10ms 16 Aug 2024 487th Natanaelel 🇸🇪 606 206 135ms 9 May 2022 487th annaproxy 606 206 142ms 3 Jun 2022 489th MeWhenI 🇻🇦 605 117 9ms 18 May 2022 490th stefangimmillaro 605 213 44ms 15 Jul 2023 491st MeWhenI 🇻🇦 604 143 371ms 23 Jun 2024 492nd sleepyStick 603 184 16ms 15 Jul 2022 493rd annaproxy 603 191 19ms 23 Oct 2022 494th tobeannouncd 603 207 137ms 2 Jan 2024 495th klixel 🇨🇦 603 260 211ms 9 Jun 2023 496th jared-hughes 602 106 23ms 19 Jul 2022 497th SirFireball3521 600 185 17ms 6 Mar 2023 497th CutSandstone 600 185 16ms 4 Jul 2024 499th SirBogman 🇺🇸 600 192 117ms 6 Oct 2025 500th MeWhenI 🇻🇦 599 215 41ms 23 Jun 2024 501st Shanethegamer 🇺🇸 598 126 36ms 9 May 2022 502nd emgordon154 598 167 15ms 27 Aug 2024 503rd nullie 597 186 17ms 8 Jun 2022 504th scpchicken 🇵🇼 594 187 16ms 4 Feb 2023 505th MeWhenI 🇻🇦 592 137 291ms 29 Jan 2023 506th Yewzir 🇧🇪 592 166 710ms 7 May 2024 507th hamhub7 592 212 338ms 8 Aug 2022 508th martinnorling 🇸🇪 591 188 16ms 10 May 2022 508th bac0id 591 188 16ms 5 Jul 2024 510th AstroOrbis 588 189 18ms 12 Jul 2025 511th SirBogman 🇺🇸 588 219 44ms 4 Nov 2024 512th retrohun 586 109 16ms 12 Oct 2024 513th dokutan 585 168 544ms 23 Jun 2024 514th Yewzir 🇧🇪 585 202 281ms 27 Oct 2023 515th hiichbindermax 584 190 18ms 8 Feb 2023 515th albanian-laundromat 584 190 16ms 12 Jul 2025 515th robin-scragg 584 190 19ms 3 Oct 2025 518th Yewzir 🇧🇪 583 215 363ms 22 Dec 2024 519th eranws 581 143 10ms 23 Oct 2022 519th AlephSquirrel 581 143 9ms 21 Dec 2022 521st jhpaques 🇫🇷 581 191 17ms 26 Jul 2022 521st hellwue 581 191 16ms 8 Feb 2023 523rd blaztoma 🇱🇹 579 130 41ms 11 Oct 2025 524th DialFrost 🇸🇬 578 178 2ms 29 Jan 2024 525th madeforlosers 578 192 18ms 13 Nov 2025 526th emgordon154 577 140 1,010ms 25 Nov 2024 527th two-bad 🇬🇧 577 144 10ms 9 Feb 2024 528th rifatx 577 205 269ms 23 Jul 2024 529th Yewzir 🇧🇪 577 215 2,635ms 7 May 2024 530th msbranicky 575 193 17ms 10 Aug 2023 531st MeWhenI 🇻🇦 575 207 14ms 1 Oct 2022 531st DialFrost 🇸🇬 575 207 7ms 14 Jan 2024 533rd MeWhenI 🇻🇦 575 291 45ms 30 Aug 2024 534th Yewzir 🇧🇪 573 297 17ms 22 Dec 2024 535th MeWhenI 🇻🇦 572 166 4ms 28 May 2023 536th msbranicky 572 274 251ms 1 Oct 2023 537th martinnorling 🇸🇪 571 124 9ms 13 May 2022 538th SirBogman 🇺🇸 571 185 2ms 21 May 2022 539th coreynash 569 146 10ms 19 Oct 2023 539th alexsave 569 146 10ms 15 Nov 2025 541st Pena86 569 195 18ms 14 Sep 2022 542nd alphafalfa 568 110 6ms 25 Oct 2024 543rd MeWhenI 🇻🇦 568 307 56ms 23 Jun 2024 544th emgordon154 568 374 1,856ms 5 hours ago 545th DialFrost 🇸🇬 567 143 263ms 16 Jun 2024 546th tatzyr 🇯🇵 566 133 36ms 18 Feb 2025 547th voytxt 🇨🇿 564 197 17ms 1 Mar 2023 548th Schmitt-Very-Cool 564 252 450ms 30 Sep 2025 549th the-zammers 562 222 146ms 15 Oct 2023 550th bac0id 562 223 373ms 29 Jun 2024 551st MeWhenI 🇻🇦 561 157 23ms 23 Jun 2024 552nd bac0id 561 191 97ms 29 Jun 2024 553rd emgordon154 561 220 4ms 3 Jan 2025 554th SirBogman 🇺🇸 559 86 34ms 9 Jan 2023 555th shinh 558 135 38ms 25 Jun 2022 555th emgordon154 558 135 47ms 12 Sep 2024 557th alemelis 558 155 363ms 22 Sep 2024 558th lifthrasiir 🇰🇷 557 85 4ms 27 Nov 2024 559th 386asm 🇺🇸 557 214 39ms 4 May 2023 560th 0dyse 555 200 16ms 13 Sep 2025 First Prev 481–560 of 706 Next Last