is 2 7720697 - 1
has 2324162 decimal digits
takes 1.767 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L529CD6160E9E30A7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.848665.6716%9500017812500.06203.1089%3.910666.7389%1.0672%
PrimeNet2630.206763.4921%340009000000.02693.5463%0.233764.7867%1.2947%
GPU722673.848665.6716%5000011000000.03562.4488%3.884266.5123%0.8406%
Difference---+45000+681250+0.0264+0.6601%+0.0264+0.2266%+0.2266%

Known prime factors (1 factor, 69.1 bits, 0.00089494% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
77206976306880610058694879912169.09540843984746835
5 × 8168796949367
2018-06-275816879694936717.659147,665275,797

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-11-24T00:00:00ANONYMOUSv4_computers40000560000---0.023--1.960%
2012-08-13T20:57:00NesowaWork950001781250---0.062--3.109%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-02T00:00:00ANONYMOUSv4_computers21261--0.040--
1998-09-06T00:00:00ANONYMOUSv4_computers21263--0.207--
2013-10-07T13:07:00NesowaManual testing263264--0.254--
2013-12-17T23:34:00David CampeauManual testing264265--0.484--
2015-06-03T12:35:00VictordeHollanderManual testing265266--0.968--
2016-09-05T00:57:29Gordon SpenceManual testing266267--1.936--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.392 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:1.392 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000031.044
50000500000010.348


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-27T00:00:00vidmarv4_computers529CD6160E9E30A71.767
2003-02-09T00:00:00ANONYMOUSv4_computers529CD6160E9E30A71.767


PRP results:
dateuseridcompidcofactorsres64PRP
2018-06-27T08:04:20ATHec2-PRPCF
630688061005869487991
BE07520F58EBFF__no
2019-09-06T14:48:10kkmrkkblmbrbkc5.large
630688061005869487991
BE07520F58EBFFFFno


P-1 factor-bounds graph:
B1 = 95000, B2 = 1781250 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 40000, B2 = 560000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-09-06T14:48:10+00:00