is 2 58127191 - 1
has 17498029 decimal digits
takes 123.197 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LAE861C20743E2ED5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27332.907964.3836%8100008100002.48932.0360%35.397265.1087%
Target27332.907964.3836%40000010400000018.57574.0784%51.483665.8362%
Difference---+410000-103190000-16.0864-2.0424%-16.0864-0.7274%

Known prime factors (1 factor, 65.5 bits, 0.00011272% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58127191529010830724339018572065.520455045927408
24 × 28440370463		2015-01-2716284403704630.18754,761.98,894.0

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-22ANONYMOUS810000810000---2.489--2.036%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-01-27BloodIceURM2??65.520200.062282.40.142
1999-12-08ANONYMOUSv4_computers21253--2.06431e-5--
1999-12-23ANONYMOUSv4_computers21253--2.06431e-5--
2000-02-09ANONYMOUSv4_computers21254--4.12861e-5--
2000-06-26ANONYMOUSv4_computers21256--0.000--
2000-06-28ANONYMOUSv4_computers21256--0.000--
2000-06-29ANONYMOUSv4_computers21256--0.000--
2001-07-17ANONYMOUSv4_computers21257--0.000--
2002-05-05ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-11-16ANONYMOUSv4_computers21261--0.005--
2022-06-27LordJuliusManual testing261263--0.022--
2008-10-27sasaki3mate24263264--0.034--
2008-10-28Sturle Sundeherrick.ifi264265--0.064--
2008-10-28KYOJI_KAMEIwlaptop265266--0.129--
2008-10-28KYOJI_KAMEIwlaptop266267--0.257--
2009-06-02korvalenovoLAP1267268--0.514--
2011-05-10opyrtManual testing268269--1.028--
2011-05-10opyrtManual testing269270--2.057--
2011-05-10opyrtManual testing270271--4.114--
2012-06-02Craig MeyersManual testing271272--8.228--
2012-08-06Jerry HallettManual testing272273--16.46--


ECM factoring results:
No ECM results for M58127191


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-07-13William WallaceT620AE861C20743E2ED5123.2


PRP results:
No PRP results for M58127191


P-1 factor-bounds graph:
B1 = 810000 (P-1 stage 1)
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106
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TF factor-bounds graph:
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2
this exponent TF target: 73
TF double-checked to: 67.8
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Last modified: 2023-06-05T21:50:05+00:00