is 2 58145281 - 1
has 17503474 decimal digits
takes 123.236 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
Actual27332.897764.3836%----32.897764.3836%
Target27332.897764.3836%40000010400000018.57574.0786%51.473365.8362%
Difference----400000-104000000-18.5757-4.0786%-18.5757-1.4527%

Known prime factors (1 factor, 64.8 bits, 0.00011143% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58145281318842478121053332632064.789274177433351
19 × 14951 × 965179		2012-10-12149519651790.11230.20500.3018

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-10-12S01103In-Laws2064.789-246.5-0.000%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-08ANONYMOUSv4_computers21253--2.06366e-5--
1999-12-23ANONYMOUSv4_computers21253--2.06366e-5--
2000-02-09ANONYMOUSv4_computers21254--4.12733e-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--
2002-06-09ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-11-16ANONYMOUSv4_computers21261--0.005--
2022-06-27LordJuliusManual testing261263--0.022--
2008-10-27Fanchar LandagWorkstation263264--0.034--
2008-10-27KYOJI_KAMEIwlaptop264265--0.064--
2008-10-27KYOJI_KAMEIwlaptop265266--0.129--
2008-10-27KYOJI_KAMEIwlaptop266267--0.257--
2009-07-29PrimewiseEVGA_x58_sli_se267268--0.514--
2011-08-26Carsten KossendeyManual testing268269--1.028--
2011-09-29dmaineManual testing269270--2.056--
2011-11-09ANONYMOUS270271--4.113--
2012-06-04Kyle AskineManual testing271272--8.225--
2012-09-11bcp19Manual testing272273--16.45--


ECM factoring results:
No ECM results for M58145281


Lucas-Lehmer results:
No L-L results for M58145281


PRP results:
No PRP results for M58145281


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
273
272
271
270
269
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