929141761
This number is a prime.
Just showing those entries submitted by 'Loungrides': (Click here to show all)
The largest prime formed from a double-digit prime p,
(p=61), by writing right-to-left the sums of digits which
precede it, so that all the previous numbers, that are
produced by this process, are primes, i.e., 761, 41761,
9141761, 929141761. [Loungrides]
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