is 2 2049127 - 1
has 616849 decimal digits
takes 0.135 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L94C1BE5D3CB55581double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.500868.6567%500000150000000.12305.1380%14.623870.2671%1.6104%
PrimeNet2580.018763.7931%90001600000.00162.6654%0.020464.7582%0.9651%
GPU722620.299866.1290%90001200000.00141.3302%0.301366.5796%0.4505%
Difference+5+14.2010+2.5277%+491000+14880000+0.1216+3.8078%+14.3225+3.6876%+3.6876%

Known prime factors (1 factor, 81.2 bits, 0.00396263% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
204912727758954680884966675773512581.199677336121208811525
52 × 27093444848352461
2018-09-272527093444848352461310,643140,730,126262,844,685

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-04-28T00:00:00Jocelyn Larouchev4_computers10001000---9.53375e-5--0.007%
2002-05-05T00:00:00Jocelyn Larouchev4_computers20002000---0.000--0.022%
2003-01-16T00:00:00ANONYMOUSv4_computers25000425000---0.004--1.261%
2010-12-28T23:08:00Jocelyn LaroucheManual testing3000030000---0.003--0.412%
2011-01-04T22:09:00Jocelyn LaroucheManual testing5000050000---0.005--0.593%
2012-01-06T09:06:00Squeeky_SquirrelP4_26001350002868750---0.027--3.035%
2014-10-22T23:53:00Jocelyn LaroucheManual testing166323166323---0.016--1.209%
2015-10-06T12:44:49Bruno Victal4790K-windows5000001500000012---0.123--5.138%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-10T00:00:00MadPoov4_computers21258--0.019--
2016-02-23T16:29:04Mark RoseManual testing258260--0.056--
2009-01-03T02:41:00Sturle Sundegoomba.ifi260261--0.075--
2012-02-29T07:47:00Sebastian HornbostelManual testing261262--0.150--
2013-08-30T08:22:00ramgeisManual testing262263--0.479--
2015-04-13T20:09:00VictordeHollanderManual testing263264--0.958--
2015-04-13T20:09:00VictordeHollanderManual testing264265--1.823--
2015-11-03T10:10:04ramgeisManual testing265266--3.647--
2016-08-10T20:04:42Gordon SpenceManual testing266267--7.294--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.393 GHz-days
Estimated T-Level:2.000
DigitsB1CurvesCompleteFacMiss
201100040 / 1000.40066.897%
255000040 / 2800.14386.666%

New Calculation Method

Total ECM effort:3.393 GHz-days
Estimated T-Level:2.000
DigitsB1CompleteFacMiss
20110001.29027.518%
25500000.11788.993%
302500000.00799.284%


ECM Summary

B1B2factorcurvesGHz-days
500005000000393.309
50000500000010.085


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00MadPoov4_computers94C1BE5D3CB555810.135


PRP results:
dateuseridcompidcofactorsres64PRP
2018-09-27T23:28:02storm55107700_Kaby_Lake
2775895468088496667577351
A527F949145579__no
2018-09-27T23:47:11ANONYMOUS
2775895468088496667577351
A527F949145579__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 135000, B2 = 2868750 (P-1 stage 2)
B1 = 166323 (P-1 stage 1)
B1 = 135000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 25000, B2 = 425000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
B1 = 25000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-09-27T23:47:11+00:00