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11680RE: [PrimeNumbers] Re: Isomorphic Numbers

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  • Phil Carmody
    Mar 5, 2003
      --- Jon Perry <perry@...> wrote:
      > These are for the isomorph a+b <=> ab-1.
      >
      > (no guarenteed prime)

      First ones with primes appended, and appended.

      > run length 1 [1,...,1]
      > run length 2 [2,...,3]
      > run length 3 [5,...,7]
      > run length 4 [56,...,59]
      > run length 5 [121,...,125] 131..135
      > run length 6 [211,...,216]
      > run length 7 [819,...,825] 915..921
      > run length 8 [1470,...,1477] 1470..1477
      > run length 9 [2231,...,2239] 2231..2239
      > run length 10 [15886,...,15895] 42672..42681
      > run length 11 [44275,...,44285] 89663..89673
      > run length 12 [44275,...,44286] 89663..89674
      > run length 13 [44275,...,44287] 505989..506001

      787374..787387 is len 14
      1262441..1262455 is len 15
      3623705..3623720 is len 16
      7993838..7993854 is len 17
      7993838..7993855 is len 18
      7993838..7993856 is len 19
      7993838..7993857 is len 20
      117532072..117532092 is len 21 (6m40s)


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