is 2 1171979 - 1
has 352801 decimal digits
takes 0.036 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L284BDACA1F278CEEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26725.353668.6567%300000100000000.03684.1486%25.390569.9570%1.3003%
PrimeNet2560.008262.5000%5000800000.00042.2590%0.008663.3471%0.8471%
GPU722600.131165.0000%5000280000.00030.7985%0.131365.2795%0.2795%
Difference+7+25.2226+3.6567%+295000+9972000+0.0366+3.3501%+25.2591+4.6776%+4.6776%

Known prime factors (2 factors, 141.0 bits, 0.01203277% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
11719793551909401483368711858.301151534686265
5 × 2953 × 10263101
2007-10-122953102631010.05380.02500.0464
117197979664186896086926350673932582.7203398703683943437824
29 × 17 × 401 × 296243 × 3287017
2014-12-272962433287017966,7060.02040.0268

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1171979282959974397739339071313796290606195174730343141.022
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00Jocelyn Larouchev4_computers3030---1.33400e-6--0.000%
2002-05-05T00:00:00Jocelyn Larouchev4_computers10001000---4.44667e-5--0.005%
2002-08-17T00:00:00Jocelyn Larouchev4_computers20002000---8.89333e-5--0.018%
2002-08-17T00:00:00Jocelyn Larouchev4_computers30003000---0.000--0.033%
2002-08-17T00:00:00Jocelyn Larouchev4_computers40004000---0.000--0.049%
2002-08-17T00:00:00Jocelyn Larouchev4_computers50005000---0.000--0.065%
2002-08-24T00:00:00Jocelyn Larouchev4_computers60006000---0.000--0.080%
2002-08-24T00:00:00Jocelyn Larouchev4_computers3276832768---0.001--0.390%
2014-12-27T12:07:00alpertronManual testing30000010000000122582.7200.0370.0720.0744.149%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-04T00:00:00ANONYMOUSv4_computers21257--0.016--
2003-05-11T00:00:00ANONYMOUSv4_computers21258--0.033--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.410 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:18.410 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000028110.33
25000025000000448.084


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-10-03T00:00:00ANONYMOUSv4_computers284BDACA1F278CEE0.036


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T09:37:15Oliver KruseGTX-0
355190940148336871
7966418689608692635067393
D3BD7EC5B527C0D0no
2017-10-05T21:02:02Oliver KruseManual testing
355190940148336871
7966418689608692635067393
D3BD7EC5B527C0__no
2017-10-17T13:28:04Oliver KruseThreadripper
355190940148336871
7966418689608692635067393
D3BD7EC5B527C0__no
2018-01-06T15:52:04ATHec2-1xf
355190940148336871
7966418689608692635067393
D3BD7EC5B527C0__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 6000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 3000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
B1 = 30 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
258
257
250
260
270
280
290
2100
Last modified: 2020-11-13T10:36:18+00:00