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Oct 16, 2014 at 19:43 comment added The Masked Avenger I suspect that it is more accurate to say "both $n$ and $n^2+1$ have all prime factors below a given bound". However, I haven't read Lehmer's paper nor Stormer's.
Oct 13, 2014 at 15:07 history edited so-called friend Don CC BY-SA 3.0
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Oct 13, 2014 at 15:01 history answered so-called friend Don CC BY-SA 3.0