Ctrl+P again to print, arrows/tab to navigate results, enter to confirm

    The Calendar hole will go live in approximately . Why not try and solve it ahead of time?

    Recent Solutions

    Hole Golfer Chars Time Submitted
    Tower of Hanoi JOrE20 186
    Factorial Factorisation JOrE20 687
    12 Days of Christmas JOrE20 582
    24 Game JOrE20 4,920
    Kolakoski Constant JOrE20 937
    Smooth Numbers ovs-code 10
    Partition Numbers ovs-code 15
    Cubes JOrE20 628
    Hilbert Curve JOrE20 598
    Mandelbrot JOrE20 474
    γ JOrE20 939
    99 Bottles of Beer JOrE20 1,128
    Tongue-twisters JOrE20 326
    Inventory Sequence JOrE20 1,488
    Gray Code Encoder GolfingSuccess 5
    Tutorial kurkale6ka 18
    λ JOrE20 1,002
    Multitap Input namelessiw 27
    12 Days of Christmas namelessiw 274
    Tower of Hanoi KatieLG 3,579
    Day of Week namelessiw 61
    Taxicab Numbers HumanoidCPU 4,160
    φ namelessiw 14
    Taxicab Numbers namelessiw 21
    Set namelessiw 20
    Taxicab Numbers Shanethegamer 4,160
    Factorial Factorisation namelessiw 17
    Ordinal Numbers namelessiw 34
    Apéry’s Constant namelessiw 38
    Smooth Numbers namelessiw 9
    Ascending Primes ovs-code 10
    ROT13 namelessiw 30
    Fibonacci jared-hughes 7
    √2 ovs-code 14
    φ ovs-code 13
    Vampire Numbers namelessiw 42
    √2 JOrE20 1,002
    Catalan’s Constant namelessiw 39
    Kolakoski Constant namelessiw 29
    Kolakoski Sequence namelessiw 16
    √2 namelessiw 16
    ln 2 namelessiw 16
    τ namelessiw 11
    Transpose Sentence namelessiw 9
    Number Spiral namelessiw 32
    ISBN namelessiw 17
    ASCII Table namelessiw 43
    Highly Composite Numbers namelessiw 44
    Card Number Validation namelessiw 16
    United States namelessiw 53
    Continued Fractions namelessiw 38
    Reverse Polish Notation namelessiw 6
    Collatz namelessiw 18
    Partition Numbers namelessiw 18
    Farey Sequence namelessiw 22
    Niven Numbers DialFrost 12
    Prime Numbers (Long) DialFrost 7
    Prime Numbers DialFrost 4
    Fibonacci DialFrost 6
    Divisors DialFrost 11
    Tutorial JOrE20 14
    Sphenic Numbers namelessiw 10
    Semiprime Numbers namelessiw 8
    Diamonds namelessiw 15
    99 Bottles of Beer namelessiw 150
    Christmas Trees namelessiw 24
    Tower of Hanoi namelessiw 30
    Lucky Numbers namelessiw 22
    Happy Numbers (Long) namelessiw 11
    Happy Numbers namelessiw 11
    Pascal’s Triangle namelessiw 10
    Sierpiński Triangle namelessiw 26
    Mandelbrot namelessiw 100
    Trinomial Triangle namelessiw 19
    Rule 110 namelessiw 27
    Prime Numbers (Long) Cube14yt 10
    Prime Numbers Cube14yt 8
    Happy Numbers Cube14yt 107
    24 Game Cube14yt 12,432
    Rule 110 Cube14yt 10,100