is 2 3056069 - 1
has 919969 decimal digits
takes 0.260 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP15D6CD5ACE2C1AADverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26819.503867.6471%30000001000000001.02248.0366%20.526270.2471%2.6001%
PrimeNet2600.050363.3333%120002200000.00292.5237%0.053164.2587%0.9254%
GPU722641.164765.6250%140002200000.00311.4655%1.167866.1288%0.5038%
Difference+4+18.3391+2.0221%+2986000+99780000+1.0193+6.5711%+19.3584+4.1184%+4.1184%

Known prime factors (1 factor, 74.1 bits, 0.00242579% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3056069207237396556829602336792374.1343390587656182331
11 × 308235241471121
2020-11-15113082352414711211,374.12,072,5053,870,863

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.249%
2010-10-02T05:08:00markrtiny1100002447500---0.029--2.666%
2016-10-15T05:58:31Squeeky_SquirrelP4_260019500053625006---0.059--3.501%
2017-01-04T22:58:51Jocelyn Larouchelow 4M132000132000---0.016--1.000%
2017-10-21T06:07:46mikrMSI300000010000000012---1.022--8.037%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-03T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-13T04:43:00Sturle Sundeghini.ifi260261--0.050--
2011-03-27T09:12:00Sid & AndyBuzz261262--0.101--
2013-01-07T13:54:00dbaughManual testing262263--0.321--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.642--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.223--
2015-06-06T19:31:00ThaManual testing265266--2.445--
2017-05-09T09:30:25Gordon SpenceManual testing266267--4.890--
2018-07-28T13:20:24ramgeisManual testing267268--9.78--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.913 GHz-days
Estimated T-Level:1.250
DigitsB1CurvesCompleteFacMiss
201100025 / 1000.25077.782%
255000025 / 2800.08991.444%

New Calculation Method

Total ECM effort:2.913 GHz-days
Estimated T-Level:1.250
DigitsB1CompleteFacMiss
20110000.96238.230%
25500000.08991.487%
302500000.00699.440%


ECM Summary

B1B2factorcurvesGHz-days
500005000000222.563
50000500000030.350


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-29T00:00:00dwightv4_computers6A472DF70BCF41__0.260


PRP results:
dateuseridcompidcofactorsres64PRP
2020-11-16T08:33:04Joe S.VMWare1
20723739655682960233679
15D6CD5ACE2C1AADno


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 195000, B2 = 5362500 (P-1 stage 2)
B1 = 110000, B2 = 2447500 (P-1 stage 2)
B1 = 195000 (P-1 stage 1)
B1 = 132000 (P-1 stage 1)
B1 = 110000 (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: 2020-11-16T08:33:04+00:00