• m_f@midwest.social
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    22 days ago

    ⅐ = 0.1̅4̅2̅8̅5̅7̅

    The above is 42857 * 7, but you also get interesting numbers for other subsets:

         7 * 7 =     49
        57 * 7 =    399
       857 * 7 =   5999
      2857 * 7 =  19999
     42857 * 7 = 299999
    142857 * 7 = 999999
    

    Related to cyclic numbers:

    142857 * 1 = 142857
    142857 * 2 = 285714
    142857 * 3 = 428571
    142857 * 4 = 571428
    142857 * 5 = 714285
    142857 * 6 = 857142
    142857 * 7 = 999999