is 2 3250211 - 1
has 978412 decimal digits
takes 0.277 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L651B75C77F641EC9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26936.732068.1159%3000000900000000.95527.3290%37.687275.4449%12.1116%
PrimeNet2600.047363.3333%140002600000.00342.7709%0.050666.1042%2.7709%
GPU722641.095165.6250%160002800000.00371.6549%1.098967.2799%1.6549%
Difference+5+35.6369+2.4909%+2984000+89720000+0.9515+5.6741%+36.5884+8.1651%+8.1651%

Known prime factors:
No known factors for M3,250,211

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-04T20:50:00Carsten Kossendeydurandal15000191250---0.003--0.670%
2011-09-10T23:31:00harleeP4_2600600001050000---0.014--1.695%
2014-06-11T02:10:00Jocelyn LaroucheManual testing7974879748---0.010--0.651%
2014-09-29T22:05:00Jocelyn LaroucheManual testing9949699496---0.012--0.746%
2015-10-07T12:48:58Squeeky_SquirrelP4_260016000041200006---0.046--2.891%
2017-02-04T18:42:43Jocelyn Larouche low 4MManual testing192000192000---0.024--1.083%
2017-04-03T00:18:30Jocelyn Larouche low 4MManual testing32000032000006---0.059--3.032%
2020-01-17T23:47:23BigBrotherWinston30000009000000012---0.955--7.329%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-07-07T00:00:00ANONYMOUSv4_computers?260--0.024--
2009-04-03T10:52:00S485122USB-A260261--0.047--
2011-09-24T20:50:00markrManual testing?262--0.095--
2012-12-30T00:01:00dbaughManual testing262263--0.302--
2015-02-18T11:40:00VictordeHollanderManual testing263264--0.604--
2015-02-18T11:40:00VictordeHollanderManual testing264265--1.150--
2015-06-28T13:57:00ThaManual testing265266--2.299--
2017-03-27T22:26:23Gordon SpenceManual testing266267--4.598--
2019-01-14T11:03:49TJAOIManual testing267268--9.197--
2021-02-03T14:30:16ViliamFManual testing268269--18.39--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
500005000000222.592
50000635000030.396
800001128000051.115


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-27T00:00:00ANONYMOUSv4_computers651B75C77F641EC90.277


PRP results:
Exponent "3250211" not found


P-1 factor-bounds graph:
B1 = 3000000, B2 = 90000000 (stage 2)
B1 = 3000000 (stage 1)
B1 = 320000, B2 = 3200000 (stage 2)
B1 = 160000, B2 = 4120000 (stage 2)
B1 = 320000 (stage 1)
B1 = 192000 (stage 1)
B1 = 160000 (stage 1)
B1 = 60000, B2 = 1050000 (stage 2)
B1 = 99496 (stage 1)
B1 = 79748 (stage 1)
B1 = 60000 (stage 1)
B1 = 15000, B2 = 191250 (stage 2)
B1 = 15000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-02-25T00:55:18+00:00