is 2 4018581887 - 1
has 1209713689 decimal digits
takes 1,008,180.335 GHz-days to do one PRP test
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2710.119054.9296%----0.119054.9296%
Target292249,584.102865.2174%200000009600000000197,146.23064.2378%446,730.333466.6914%
Difference-21-249,583.9838-10.2878%-20000000-9600000000-197,146.2306-4.2378%-446,730.2144-11.7618%

Known prime factors (2 factors, 89.9 bits, 0.00000224% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40185818879001623426891239.711112
24 × 7
2012-08-2016162.308e-110.00580.0118
401858188713121232462519191650.221163257
3 × 54419
2019-06-293544196.372e-81.07962.0145

1 Composite Factors:
P-1 results:
No P-1 results for M4018581887


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2019-06-2923924039.711124.85992e-12237,2911.04038e-11
2019-06-2925025150.221162.63935e-8237,2915.65014e-8
TF systematically completed to 64 but no per-exponent detailed record exists
2022-12-28slaurpalvi2-rtx268271--0.104--


ECM factoring results:
No ECM results for M4018581887


Lucas-Lehmer results:
No L-L results for M4018581887


PRP results:
No PRP results for M4018581887


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
TF factor-bounds graph:
271
251
240
this exponent TF target: 92
250
260
270
280
290
2100
Last modified: 2023-07-11T14:45:05+00:00