is 2 58720187 - 1
has 17676538 decimal digits
takes 130.449 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-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2718.141663.3803%----8.141663.3803%
Target27332.575664.3836%40000011200000020.87444.1418%53.449965.8587%
Difference-2-24.4339-1.0033%-400000-112000000-20.8744-4.1418%-45.3083-2.4785%

Known prime factors (1 factor, 66.0 bits, 0.00011238% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58720187732467553339310399612065.989623693137540
22 × 5 × 112 × 17 × 1032 × 1429		2012-03-0510609106090.20300.03420.0695

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-03-05rx7350RMCpc122065.989-260.9-0.000%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23ANONYMOUSv4_computers21253--2.04346e-5--
2000-02-09ANONYMOUSv4_computers21254--4.08692e-5--
2000-06-29ANONYMOUSv4_computers21256--0.000--
2000-07-03ANONYMOUSv4_computers21256--0.000--
2001-07-17ANONYMOUSv4_computers21257--0.000--
2002-10-26ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-12-021997rj7v4_computers21260--0.003--
2022-06-27LordJuliusManual testing260263--0.025--
2008-11-02ANONYMOUSANDREA263264--0.033--
2008-11-03Sturle Sundegaudi.ifi264265--0.064--
2008-11-03KYOJI_KAMEIwlaptop265266--0.127--
2008-11-03KYOJI_KAMEIwlaptop266267--0.255--
2008-11-03KYOJI_KAMEIwlaptop267268--0.509--
2009-06-06[DPC]TeamSwitch~MyWerk268269--1.018--
2011-05-02yabashyabash269270--2.036--
2011-10-23ANONYMOUSManual testing270271--4.072--


ECM factoring results:
No ECM results for M58720187


Lucas-Lehmer results:
No L-L results for M58720187


PRP results:
No PRP results for M58720187


P-1 factor-bounds graph:
103
104
105
103
104
105
TF factor-bounds graph:
271
270
269
268
267
266
265
264
263
260
259
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67.8
250
260
270
280
Last modified: 2023-06-05T21:50:05+00:00