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

    Lewenhaupt

    7,195
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    6,681
    🥇0
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    🥈0
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    ⛳

    10 / 123 Holes

    🔣

    1 / 62 Langs

    🏆

    5 / 99 Cheevos

    📅

    Collatz
    194th
    Emirp Numbers
    287th
    Happy Numbers
    328th
    Leap Years
    1,099th
    Niven Numbers
    76th
    Niven Numbers (Long)
    60th
    Pascal’s Triangle
    432nd
    Pernicious Numbers
    197th
    Recamán
    106th
    Van Eck Sequence
    85th