is 2 16776817 - 1
has 5050326 decimal digits
takes 9.174 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L57840D3392BB9D41double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2683.552864.7059%2550002550000.20221.8527%3.755065.3598%0.6539%
PrimeNet2650.434963.0769%7000024000000.15624.4258%0.591064.7111%1.6341%
GPU722697.116265.2174%12000032000000.22823.2891%7.344466.3614%1.1440%
Difference-1-3.5634-0.5115%+135000-2945000-0.0260-1.4363%-3.5894-1.0016%-1.0016%

Known prime factors (1 factor, 66.0 bits, 0.00039368% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16776817762338375445536770812066.0472271999436620
22 × 3 × 5 × 1549 × 24445873
2014-09-161549244458731.62071.05721.9723

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-11-24T00:00:00ANONYMOUSv4_computers255000255000---0.202--1.853%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-14T00:00:00ANONYMOUSv4_computers21256--0.001--
2001-07-17T00:00:00Jocelyn Larouchev4_computers21259--0.005--
2002-01-02T00:00:00ANONYMOUSv4_computers21265--0.435--
2022-08-10T19:28:56LordJuliusManual testing21265--0.435--
2022-08-10T19:28:56LordJuliusManual testing265266--0.445--
2014-09-16T13:08:00NesowaManual testing26626766.047200.74018.681.507
2022-08-10T19:28:56LordJuliusManual testing26626766.047200.74018.681.507
2022-08-10T19:28:56LordJuliusManual testing267268--1.782--


ECM factoring results:
No ECM results for M16776817


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-12-16T00:00:00ANONYMOUSv4_computers57840D3392BB9D419.174
2007-04-23T00:00:00ANONYMOUSv4_computers57840D3392BB9D419.174


PRP results:
No PRP results for M16776817


P-1 factor-bounds graph:
B1 = 255000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
268
267
266
265
259
256
250
260
270
280
290
2100
Last modified: 2022-08-10T19:28:56+00:00