is 2 5015209 - 1
has 1509729 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-L60A8B55DAD49BA6Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.924865.6716%550009075000.02042.2218%5.945266.4344%0.7627%
PrimeNet2610.061262.2951%220004500000.00913.3149%0.070463.5450%1.2499%
GPU722651.454764.6154%340007000000.01412.4172%1.468865.4707%0.8553%
Difference+2+4.4700+1.0563%+21000+207500+0.0063-0.1954%+4.4763+0.9636%+0.9636%

Known prime factors (1 factor, 63.1 bits, 0.00125854% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5015209100126582455936917032063.118998229410339
7 × 142604201477
2010-09-1871426042014770.68421,561.62,916.6

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2006-01-15T00:00:00Jocelyn Larouchev4_computers20002000---0.000--0.030%
2009-07-15T14:43:00harleeP4_260055000907500---0.020--2.222%


Trial Factoring results:
No TF results for M5015209


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)
1998-09-13T00:00:00ANONYMOUSv4_computers60A8B55DAD49BA6B0.695
2000-07-17T00:00:00ANONYMOUSv4_computers60A8B55DAD49BA6B0.695


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-21T05:20:32ATHec2-1xd
10012658245593691703
BBB108E0DD650D__no
2018-01-11T15:39:43kkmrkkblmbrbkc4.xlarge
10012658245593691703
BBB108E0DD650D__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)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2018-01-11T15:39:43+00:00