is 2 58577543 - 1
has 17633598 decimal digits
takes 130.132 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
Actual2718.161563.3803%----8.161563.3803%
Target27332.654964.3836%40000010400000019.47044.0824%52.125365.8376%
Difference-2-24.4934-1.0033%-400000-104000000-19.4704-4.0824%-43.9638-2.4573%

Known prime factors (1 factor, 65.3 bits, 0.00011145% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58577543449767458015599603592065.286383907752853
3 × 211 × 1187 × 510943		2012-02-2911875109430.15030.09330.1675

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-29ADLMacMini2065.286-260.3-0.000%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23ANONYMOUSv4_computers21253--2.04844e-5--
2000-02-09ANONYMOUSv4_computers21254--4.09687e-5--
2000-06-28ANONYMOUSv4_computers21256--0.000--
2000-06-29ANONYMOUSv4_computers21256--0.000--
2001-07-17ANONYMOUSv4_computers21257--0.000--
2002-10-12ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-11-081997rj7v4_computers21260--0.003--
2022-06-27LordJuliusManual testing260263--0.025--
2008-10-31KYOJI_KAMEIwlaptop263264--0.034--
2008-11-01KYOJI_KAMEIwlaptop264265--0.064--
2008-11-02KYOJI_KAMEIwlaptop265266--0.128--
2008-11-02KYOJI_KAMEIwlaptop266267--0.255--
2008-11-02KYOJI_KAMEIwlaptop267268--0.510--
2009-06-06Maciej Podgórskima268269--1.021--
2011-05-02Paul LeylandManual testing269270--2.041--
2011-10-07dmaineManual testing270271--4.082--


ECM factoring results:
No ECM results for M58577543


Lucas-Lehmer results:
No L-L results for M58577543


PRP results:
No PRP results for M58577543


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
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