7283
This number is a prime.
Just showing those entries submitted by 'Keith': (Click here to show all)
Which primes are simultaneously of the form 10s-7 and
10c-7, where s is an integer square and c is a cube? The
first one is 3 (s=c=1), and the next largest one is 7283 =
10(9^3)-7 = 10(27^2)-7. The next one after 7283 is 466553. [Keith]
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