is 2 1487599 - 1
has 447812 decimal digits
takes 0.066 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF2BA5D6A51F2BE66double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.974468.6567%2000000600000000.33427.2482%20.308670.9286%2.2718%
PrimeNet2570.012963.1579%65001000000.00082.3365%0.013764.0187%0.8608%
GPU722610.206565.5738%6000500000.00050.9462%0.207065.8995%0.3257%
Difference+6+19.7679+3.0829%+1994000+59950000+0.3337+6.3021%+20.1016+5.0290%+5.0290%

Known prime factors (2 factors, 175.9 bits, 0.01182761% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14875991591571619936160700260492477.07553494645396244576
25 × 223 × 2767 × 2709232723
2015-10-312767270923272335,2559.56017.855
14875995802804289292080578992623596793098.873195039264253743131683761
32 × 23 × 104383 × 1719967 × 5248096543
2019-05-10171996752480965436.968e+1018.62434.588

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
148759992355786228810983779239964756044973742392326737278
271
53175.947
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000270000---0.002--0.964%
2011-12-05T02:55:00markrtiny2750006000000---0.038--3.811%
2015-03-24T11:42:00alpertronManual testing200000060000000---0.334--7.248%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00garyfuv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2010-05-06T20:40:00Architects Cubedm1_f2260261--0.103--
2011-05-28T03:14:00GrunwalderGIMPManual testing21263--1.073--
2015-04-06T21:14:00snme2pm1Manual testing263264--1.320--
2015-04-06T21:14:00snme2pm1Manual testing264265--2.512--
2015-09-24T15:27:48ramgeisManual testing265266--5.023--


ECM factoring results:

Old Calculation Method

Total ECM effort:31.940 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:31.940 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.39024.916%
302500000.11689.004%
3510000000.00899.198%


ECM Summary

B1B2factorcurvesGHz-days
500005000000563.115
50000500000010.056
50000500000019410.79
250000440000005017.98


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00garyfuv4_computersF2BA5D6A51F2BE660.066
2015-07-19T16:37:00MadPooManual testingF2BA5D6A51F2BE660.066


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:29:45alpertronManual testing
159157161993616070026049
912856A569C316__no
2017-10-18T07:31:37Oliver KruseThreadripper
159157161993616070026049
912856A569C316__no
2019-05-10T14:13:14ATHec2-PRPCF
159157161993616070026049
580280428929208057899262359679
152F9733F3FE5C9Cno
2019-05-11T10:37:02kkmrkkblmbrbkc5.large
159157161993616070026049
580280428929208057899262359679
152F9733F3FE5C9Cno


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 275000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
266
265
264
263
261
258
257
250
260
270
280
290
2100
Last modified: 2022-04-14T10:47:10+00:00