is 2 6925547 - 1
has 2084798 decimal digits
takes 1.510 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0FC1639C6016DA21double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272138.087868.0556%40000004143239108.33317.9719%146.420970.6021%2.5466%
PrimeNet2630.230563.4921%280007000000.02043.1604%0.250964.6459%1.1538%
GPU722674.290565.6716%450009000000.02902.2366%4.319466.4394%0.7678%
Difference+5+133.7973+2.3839%+3955000+413423910+8.3042+5.7353%+142.1015+4.1627%+1.7788%

Known prime factors:
No known factors for M6925547

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-31T00:00:00Moopsv4_computers3000030000---0.009--0.234%
2011-09-03T20:12:00Carsten Kossendeymother44000013310000---0.361--3.505%
2021-06-02T21:12:39Dylan DelgadoManual testing6300001890000012---0.514--3.947%
2021-11-27T10:00:59Seth_TrManual testing400000011000000012---3.091--6.531%
2021-12-02T11:23:15Seth_TrManual testing4000000414323910---8.333--7.972%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-07-21T00:00:00ANONYMOUSv4_computers21262--0.089--
2001-11-24T00:00:00ANONYMOUSv4_computers21263--0.230--
2014-02-09T10:10:00NesowaManual testing263264--0.283--
2014-02-17T08:57:00lycornManual testing264265--0.540--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.079--
2016-04-03T19:14:45Gordon SpenceManual testing266267--2.158--
2018-02-27T02:58:03-Anonymous-Manual testing267268--4.316--
2020-05-01T08:51:07TJAOIManual testing268269--8.632--
2021-07-22T10:34:57takahashiManual testing269270--17.26--
2021-08-10T15:19:57SRBaseManual testing270271--34.53--
2021-09-25T07:06:41SRBaseManual testing271272--69.06--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-12T00:00:00ANONYMOUSv4_computers0FC1639C6016DA211.510
1999-10-07T00:00:00ANONYMOUSv4_computers0FC1639C6016DA211.510
2001-12-22T00:00:00ANONYMOUSv4_computers0FC1639C6016DA211.510


PRP results:
No PRP results for M6925547


P-1 factor-bounds graph:
B1 = 4000000, B2 = 414323910 (P-1 stage 2)
B1 = 4000000, B2 = 110000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 630000, B2 = 18900000 (P-1 stage 2)
B1 = 440000, B2 = 13310000 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
B1 = 440000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-02T11:23:15+00:00