is 2 1595149 - 1
has 480188 decimal digits
takes 0.071 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L9F6AC2E141BC96FEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26718.627768.6567%500000150000000.08354.9853%18.711270.2193%
Target2610.192665.5738%6500600000.00061.0556%0.193265.9372%
Difference+6+18.4351+3.0829%+493500+14940000+0.0829+3.9297%+18.5180+4.2821%

Known prime factors (1 factor, 89.6 bits, 0.00561905% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15951499593936497603887590044460892789.632300722267876038150356
22 × 32 × 59 × 347509 × 358973 × 1134967
2013-12-043589731134967142,492,8890.02600.0473

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-04James HeinrichWHS850001445000---0.010--2.278%
2013-12-04David Campeaui5-2500k500000150000002789.6320.0840.1420.1674.985%
2016-03-17alpertronManual testing5000001500000012-
skipped known factor: 959393649760388759004446089
--0.084--4.985%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-10ANONYMOUSv4_computers21257--0.012--
2003-07-30ANONYMOUSv4_computers21258--0.024--
2010-05-02Architects Cubedm1_76l260261--0.096--
2010-06-29GrunwalderGIMPManual testing21263--1.001--


ECM factoring results:
Total ECM effort:31.351 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025114.07
250000400000005017.28


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01The Grebelius Family9F6AC2E141BC96FE0.071
1999-06-15ANONYMOUSv4_computers9F6AC2E141BC96FE0.071


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02Oliver KruseGTX-0
959393649760388759004446089
ABDC1B57DD4D66__no
2017-10-31kkmrkkblmbrbkc4.xlarge
959393649760388759004446089
ABDC1B57DD4D66__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 85000, B2 = 1445000 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
263
261
258
257
this exponent TF target: 61
TF double-checked to: 67.7
ECM T-Level=25.72 ~= 69-bit
250
260
270
280
290
Last modified: 2023-03-25T13:08:14+00:00