is 2 15927383 - 1
has 4794621 decimal digits
takes 8.709 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L97423F85FE365AD4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.865664.1791%2350002350000.18632.0030%2.051964.8966%0.7175%
PrimeNet2650.458163.0769%7000022000000.14754.3156%0.605664.6704%1.5934%
GPU722697.495765.2174%11000028000000.20343.1230%7.699166.3036%1.0863%
Difference-2-5.6301-1.0383%+125000-2565000-0.0171-1.1200%-5.6472-1.4071%-1.4071%

Known prime factors (1 factor, 66.8 bits, 0.00041914% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
159273831248030287142614712012166.7583917876173200
24 × 32 × 52 × 11 × 101 × 979567
2014-07-291019795671.59750.04240.0790

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-06-23T00:00:00ANONYMOUSv4_computers235000235000---0.186--2.003%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-01-28T00:00:00Net_Forcev4_computers21258--0.002--
2001-03-18T00:00:00Net_Forcev4_computers21259--0.005--
2001-07-17T00:00:00Jocelyn Larouchev4_computers21260--0.010--
2002-01-08T00:00:00ANONYMOUSv4_computers21265--0.458--
2022-06-25T04:27:43LordJuliusManual testing265266--0.469--
2014-07-29T23:11:00NesowaManual testing26626766.758210.67017.721.364


ECM factoring results:
No ECM results for M15927383


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-07-20T00:00:00ANONYMOUSv4_computers7BE2C924368574__8.709
2004-12-23T00:00:00Architects Cubedv4_computers97423F85FE365AD48.709
2006-06-13T00:00:00ANONYMOUSv4_computers97423F85FE365AD48.709


PRP results:
No PRP results for M15927383


P-1 factor-bounds graph:
B1 = 235000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
TF factor-bounds graph:
267
266
265
260
259
258
250
260
270
280
290
2100
Last modified: 2022-06-25T04:27:43+00:00