is 2 5015987 - 1
has 1509963 decimal digits
takes 0.695 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L68E48AF5A284F829double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.923865.6716%550009075000.02042.2219%5.944266.4344%0.7627%
PrimeNet2610.061262.2951%220004500000.00913.3150%0.070363.5450%1.2499%
GPU722651.454564.6154%340007000000.01412.4173%1.468665.4707%0.8554%
Difference+2+4.4694+1.0563%+21000+207500+0.0063-0.1954%+4.4756+0.9636%+0.9636%

Known prime factors (1 factor, 69.3 bits, 0.00138207% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
50159877392157147271936480332169.32573685967958768
24 × 112 × 29063 × 1309601
2010-07-0529063130960124.2550.01990.0268

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2006-01-15T00:00:00Jocelyn Larouchev4_computers20002000---0.000--0.030%
2009-07-15T22:21:00harleeP4_260055000907500---0.020--2.222%


Trial Factoring results:
No TF results for M5015987


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-14T00:00:00Joel Armengaudv4_computers68E48AF5A284F8290.695
2000-08-01T00:00:00korvav4_computers68E48AF5A284F8290.695


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-22T01:38:18Oliver KruseGTX-1
739215714727193648033
6F9F4EE46E1922__no
2018-01-13T19:01:33kkmrkkblmbrbkold
739215714727193648033
6F9F4EE46E1922__no


P-1 factor-bounds graph:
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 55000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2018-01-13T19:01:33+00:00