is 2 42650347 - 1
has 12839034 decimal digits
takes 62.865 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L132C54C55BBAD023double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27489.703064.8649%1500000450000008.27115.2529%97.974270.1178%8.3531%
PrimeNet2681.397561.7647%19000080000001.31555.3368%2.713067.1015%5.3368%
GPU7227222.422663.8889%30000090000001.65423.8762%24.076967.7651%3.8762%
Difference+2+67.2804+0.9760%+1200000+36000000+6.6169+1.3767%+73.8973+2.3527%+2.3527%

Known prime factors (1 factor, 123.5 bits, 0.00028963% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
426503471535595200239952881693677941076507775138123.530180021419314589970591995176625
53 × 571 × 118787 × 752093 × 880703 × 32055911
880703320559112021-03-264.204e+95.51246.9716

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-03-20T22:51:00ANONYMOUSv4_computers4900008575000---1.989--3.351%
2009-03-24T00:00:00ANONYMOUSv4_computers4900008575000---1.989--3.351%
2021-03-26T21:34:31Sid & AndyManual testing15000004500000038123.5308.271125.716.545.253%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2007-07-04T00:00:001997rj7v4_computers?268--0.701--
2014-01-03T18:14:00LaurVManual testing268269--1.402--
2014-04-13T11:06:00Grant McCrackenManual testing269270--2.803--
2015-04-05T12:49:00Mark RoseManual testing270271--5.607--
2015-08-31T20:59:00ANONYMOUSManual testing271272--11.21--
2019-10-06T15:14:42-Anonymous-Manual testing272273--22.43--
2020-01-17T19:46:11-Anonymous-Manual testing273274--44.85--


ECM factoring results:
Exponent "42650347" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-02-22T02:59:00stephensonDell_E510132C54C55BBAD02362.86
2018-01-28T21:41:20RainchillHaswell132C54C55BBAD02362.86


PRP results:
Exponent "42650347" not found


P-1 factor-bounds graph:
B1 = 1500000, B2 = 45000000 (stage 2)
B1 = 1500000 (stage 1)
B1 = 490000, B2 = 8575000 (stage 2)
B1 = 490000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-03-26T21:34:31+00:00