is 2 25176181 - 1
has 7578786 decimal digits
takes 21.575 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
Actual2671.180262.6866%----1.180262.6866%
Target2709.491164.2857%18000055000000.58383.7361%10.075065.6201%
Difference-3-8.3109-1.5991%-180000-5500000-0.5838-3.7361%-8.8947-2.9335%

Known prime factors (2 factors, 117.9 bits, 0.00046846% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
25176181842921592701894471756.2261674045783
32 × 3413 × 54499		2001-08-243413544990.00060.00770.0086
2517618137800754947893809991961.71375072456279
32 × 41 × 109 × 1866499		2016-05-2410918664990.01720.12650.2360

1 Composite Factors:
P-1 results:
No P-1 results for M25176181


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-24Mattv4_computers??56.226170.00053.220.001
2001-08-12Net_Forcev4_computers21256--0.000--
2022-06-24LordJuliusManual testing2126156.226170.00153.220.001
2016-05-24TJAOIManual testing261262*61.713190.00553.200.012


ECM factoring results:
No ECM results for M25176181


Lucas-Lehmer results:
No L-L results for M25176181


PRP results:
No PRP results for M25176181


P-1 factor-bounds graph:
101
102
103
104
101
102
103
104
105
106
107
TF factor-bounds graph:
262
261
256
2
this exponent TF target: 70
TF double-checked to: 67.7
250
260
270
Last modified: 2022-06-24T06:17:32+00:00