is 2 58287553 - 1
has 17546302 decimal digits
takes 123.537 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
Actual2681.022661.7647%----1.022661.7647%
Target27332.817464.3836%40000010400000018.57574.0799%51.393065.8367%
Difference-5-31.7948-2.6189%-400000-104000000-18.5757-4.0799%-50.3704-4.0720%

Known prime factors (1 factor, 67.0 bits, 0.00011492% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
582875531458366765288310482972166.9831251010456116
22 × 3 × 141803 × 735181		2011-08-291418037351810.25540.53510.8869

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-08-29Scott CrawfordCorei72166.983-247.1-0.000%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23ANONYMOUSv4_computers21253--2.05863e-5--
2000-02-09ANONYMOUSv4_computers21254--4.11725e-5--
2000-06-28ANONYMOUSv4_computers21256--0.000--
2000-06-29ANONYMOUSv4_computers21256--0.000--
2001-07-17ANONYMOUSv4_computers21257--0.000--
2002-09-22ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-12-13ANONYMOUSv4_computers21261--0.005--
2022-06-27LordJuliusManual testing261263--0.022--
2008-10-28KYOJI_KAMEIwlaptop263264--0.034--
2008-10-28KYOJI_KAMEIwlaptop264265--0.064--
2008-10-28KYOJI_KAMEIwlaptop265266--0.128--
2008-10-28KYOJI_KAMEIwlaptop266267--0.256--
2009-06-04PerendiePC2D267268--0.513--


ECM factoring results:
No ECM results for M58287553


Lucas-Lehmer results:
No L-L results for M58287553


PRP results:
No PRP results for M58287553


P-1 factor-bounds graph:
104
105
106
104
105
106
TF factor-bounds graph:
268
267
266
265
264
263
261
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