in reply to Finding Primes

The Following number is an example of a number is a product of two primes and has 400 digits

1000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000666
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
000000000000000000000000000000000078489

Is it the product of two prime one of them being 10**199 + 153 the other 1**199 + 513.

note that I didn't found these numbers by using Perl

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Re: Re: Finding Primes
by Anonymous Monk on Aug 14, 2003 at 14:21 UTC

    ...nor did you use your fingers and toes to count the digits?
    I make it 399, not 400.... and isn't (1**199)=1 ??

    arithmetically_challenged