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 %4000007000000013.50334.1418 %46.078965.8587 %
Difference-2-24.4339-1.0033 %-400000-70000000-13.5033-4.1418 %-37.9373-2.4785 %

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:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-03-05rx7350RMCpc122065.9891.9810.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-23ANONYMOUSv4_computers212532.04000e-5
2000-02-09ANONYMOUSv4_computers212544.09000e-5
2000-06-29ANONYMOUSv4_computers212560.000
2001-07-17ANONYMOUSv4_computers212570.000
2002-10-26ANONYMOUSv4_computers212580.001
2003-07-30ANONYMOUSv4_computers212590.001
2003-12-021997rj7v4_computers212600.001
2022-06-27LordJuliusManual testing260263
2008-11-02ANONYMOUSANDREA2632640.032
2008-11-03Sturle Sundegaudi.ifi2642650.064
2008-11-03KYOJI_KAMEIwlaptop2652680.891
2009-06-06[DPC]TeamSwitch~MyWerk2682691.018
2011-05-02yabashyabash2692702.036
2011-10-23ANONYMOUSManual testing2702714.072


ECM factoring results:
No ECM results for M58720187


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


PRP results:
No PRP results for M58720187


CERT results:
No CERT results for M58720187


P-1 factor-bounds graph:
103
104
105
103
104
105
TF factor-bounds graph:
271
270
269
268
265
264
263
260
259
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00