mersenneforum.org 10^224 + 3 factored
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 2016-12-31, 16:22 #1 2147483647   Dec 2016 1510 Posts 10^224 + 3 factored Over the past 4 days I have factored 10^224 + 3 with SNFS: 10^224 + 3 = 31 * 163 * 10375177 * 2147412247 * 2626740241 * p53 * p143 where, p53 = 12990698891657411076992159311045314886517612608111711 p143 = 26030955979807745884254818245405455117463020841137848235991631074036576683637020875736166767781501282998012566764565635316004963061923000498079 I was quite disappointed at the p53 factor, I probably could have factored it with ecm in a few hours, but never mind. Sieving time was about 90 hours on 48 threads (although I used yafu so I had the problem I mentioned in this thread, so it could have been faster), which was quite a lot longer than yafu's estimate of 58 hours, then about 8 hours for linear algebra.

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