is 2 16918007 - 1
has 5092828 decimal digits
takes 9.251 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA48575C47E38D936double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2683.523263.2353%22000054450000.40014.4897%3.923364.8859%1.6506%
PrimeNet2650.431261.5385%8000024000000.16364.5271%0.594963.2797%1.7412%
GPU722697.056863.7681%12000032000000.22823.2930%7.285064.9612%1.1931%
Difference-1-3.5336-0.5328%+100000+2245000+0.1719+1.1966%-3.3617-0.0753%-0.0753%

Known prime factors (1 factor, 66.2 bits, 0.00039133% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16918007850206818810192915512066.2042512727470825
52 × 11 × 13 × 702860831
2014-09-21257028608311.703830.36256.708

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-02-02T00:00:00cmarblev4_computers2200005445000---0.400--4.490%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-14T00:00:00ANONYMOUSv4_computers21256--0.001--
2000-12-31T00:00:00ANONYMOUSv4_computers21258--0.002--
2001-05-13T00:00:00Net_Forcev4_computers21259--0.005--
2002-03-10T00:00:00Team Prime Ribv4_computers21265--0.431--
2022-08-10T19:28:56LordJuliusManual testing21265--0.431--
2022-08-10T19:28:56LordJuliusManual testing265266--0.442--
2014-09-21T13:07:00NesowaManual testing26626766.204200.83118.831.691
2022-08-10T19:28:56LordJuliusManual testing26626766.204200.83118.831.691
2022-08-10T19:28:56LordJuliusManual testing267268--1.767--


ECM factoring results:
No ECM results for M16918007


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-02-16T00:00:00cmarblev4_computersA48575C47E38D9369.251
2006-11-28T00:00:00ANONYMOUSv4_computersA48575C47E38D9369.251


PRP results:
No PRP results for M16918007


P-1 factor-bounds graph:
B1 = 220000, B2 = 5445000 (P-1 stage 2)
B1 = 220000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-08-10T19:28:56+00:00