is 2 2228137 - 1
has 670737 decimal digits
takes 0.147 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7060DE316680B9A5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26713.335867.1642%2000000650000000.51797.6557%13.853769.6780%2.5138%
PrimeNet2580.017262.0690%100001800000.00182.8698%0.019163.1575%1.0885%
GPU722620.275764.5161%110001800000.00191.6311%0.277765.0949%0.5788%
Difference+5+13.0600+2.6481%+1989000+64820000+0.5160+6.0246%+13.5760+4.5831%+4.5831%

Known prime factors (1 factor, 95.2 bits, 0.00427346% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2228137460912172211426760069422203032995.21810342994443596303999023
10342994443596303999023
2016-11-251103429944435963039990235.022e+95.372e+131.003e+14

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-03-27T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.281%
2004-01-07T00:00:00markrv4_computers30000532500---0.005--1.441%
2011-01-16T03:39:00Jocelyn LaroucheManual testing5000050000---0.005--0.603%
2012-01-07T09:07:00Squeeky_SquirrelP4_26001500003262500---0.030--3.218%
2015-11-23T19:12:41Alexander DubrovinManual testing100000060000006---0.121--4.585%
2015-11-24T16:05:50Alexander DubrovinManual testing10000001400000012---0.163--5.497%
2016-01-05T12:37:21Alexander DubrovinManual testing20000006500000012---0.518--7.656%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:09Mark RoseManual testing21260--0.069--
2009-01-11T01:50:00Sturle Sundegopher.ifi260261--0.069--
2012-04-20T05:48:00Sebastian HornbostelManual testing261262--0.138--
2013-01-23T08:24:00dbaughManual testing262263--0.441--
2015-03-06T11:16:00VictordeHollanderManual testing263264--0.881--
2015-03-06T11:16:00VictordeHollanderManual testing264265--1.677--
2015-10-25T20:35:09ramgeisManual testing265266--3.354--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.315 GHz-days
Estimated T-Level:1.350
DigitsB1CurvesCompleteFacMiss
201100027 / 1000.27076.234%
255000027 / 2800.09690.792%

New Calculation Method

Total ECM effort:2.315 GHz-days
Estimated T-Level:1.350
DigitsB1CompleteFacMiss
20110000.87141.855%
25500000.07992.430%
302500000.00599.516%


ECM Summary

B1B2factorcurvesGHz-days
500005000000242.058
50000500000030.257


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-14T00:00:00ANONYMOUSv4_computers7060DE316680B9A50.147


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-09T22:29:00Oliver KruseGTX-2
46091217221142676006942220303
530A5B99886969__no
2017-11-20T11:37:07kkmrkkblmbrbkc4.xlarge
46091217221142676006942220303
530A5B99886969__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 65000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 1000000, B2 = 14000000 (P-1 stage 2)
B1 = 1000000, B2 = 6000000 (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 = 30000, B2 = 532500 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2017-11-20T11:37:07+00:00