is 2 2245951 - 1
has 676099 decimal digits
takes 0.148 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L141D633765B10022double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26953.156568.1159%36772551287039151.00007.5935%54.156570.5371%2.4211%
PrimeNet2580.017162.0690%100001800000.00182.8740%0.018963.1591%1.0901%
GPU722620.273564.5161%110001900000.00201.6594%0.275565.1049%0.5888%
Difference+7+52.8829+3.5998%+3666255+128513915+0.9980+5.9341%+53.8809+5.4321%+5.4321%

Known prime factors:
No known factors for M2245951

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-18T00:04:00Jocelyn LaroucheManual testing5000050000---0.005--0.442%
2012-01-07T13:36:00Squeeky_SquirrelP4_26001500003262500---0.030--2.570%
2015-12-05T07:06:24Alexander DubrovinManual testing10000001000000012---0.142--4.252%
2020-11-04T10:19:57GdSManual testing367725512870391512---1.000--7.593%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:09Mark RoseManual testing21260--0.068--
2009-01-11T10:06:00Sturle Sundegibsy.ifi260261--0.068--
2012-05-03T17:47:00Sebastian HornbostelManual testing261262--0.137--
2013-12-04T02:15:00LaurVManual testing262263--0.437--
2015-03-10T10:44:00VictordeHollanderManual testing263264--0.874--
2015-03-10T10:44:00VictordeHollanderManual testing264265--1.664--
2015-10-27T09:37:29ramgeisManual testing265266--3.327--
2017-01-05T21:20:48Gordon SpenceManual testing266267--6.654--
2019-04-01T13:34:46TJAOIManual testing267268--13.31--
2021-07-05T07:40:31TJAOIManual testing268269--26.62--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.103 GHz-days
Estimated T-Level:23.464
DigitsB1CurvesCompleteFacMiss
2011000194 / 1001.94014.231%
2550000194 / 2800.69349.953%

New Calculation Method

Total ECM effort:17.103 GHz-days
Estimated T-Level:23.464
DigitsB1CompleteFacMiss
20110007.5260.054%
25500000.69549.898%
302500000.04495.712%
3510000000.00299.795%


ECM Summary

B1B2factorcurvesGHz-days
500005000070.355
50000500000018015.45
50000515000070.608
50000675000070.688


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-06-09T00:00:00ANONYMOUSv4_computers141D633765B100220.148
2002-06-23T00:00:00ANONYMOUSv4_computers141D633765B100220.148


PRP results:
No PRP results for M2245951


P-1 factor-bounds graph:
B1 = 3677255, B2 = 128703915 (P-1 stage 2)
B1 = 3677255 (P-1 stage 1)
B1 = 1000000, B2 = 10000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 150000, B2 = 3262500 (P-1 stage 2)
B1 = 150000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-06-10T18:09:57+00:00