is 2 1575083 - 1
has 474148 decimal digits
takes 0.070 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.865068.6567%500000150000000.08354.9777%18.948570.2169%1.5602%
PrimeNet2570.012263.1579%70001100000.00082.4791%0.013064.0712%0.9133%
GPU722610.195065.5738%6500600000.00061.0527%0.195665.9362%0.3624%
Difference+6+18.6700+3.0829%+493500+14940000+0.0829+3.9250%+18.7529+4.2807%+4.2807%

Known prime factors (3 factors, 137.6 bits, 0.00873594% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15750833150167721.5871
1
-111.774e-136.477e-81.318e-7
15750838856042302279111549.654281129385
3 × 5 × 1901 × 9859
2014-05-08190198597.219e-50.00020.0003
1575083945448085937614681772066.35830012643331736
23 × 3 × 13 × 96194369653
2018-11-15139619436965313.147339.44633.98

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
157508327898012211243677111372271.241
15750832978319360533837829227355592787.945
15750838372928243672330969997435868368824735116.011
157508326376122246584535834763912557151815398724942137.598
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:16:33alpertronManual testing5000001500000012-
skipped known factor: 3150167
skipped known factor: 885604230227911
--0.084--4.978%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-05-08T12:16:00TJAOIManual testing??49.654152.45797e-50.1555.41461e-5


ECM factoring results:

Old Calculation Method

Total ECM effort:31.305 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:31.305 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.39024.916%
302500000.11689.004%
3510000000.00899.198%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025013.99
50000500000010.056
250000400000005017.25


Lucas-Lehmer results:
No L-L results for M1575083


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T23:07:09Oliver KruseGTX-1
3150167
885604230227911
B0ECF0827DEE7E__no
2017-10-31T09:34:00kkmrkkblmbrbkc4.xlarge
3150167
885604230227911
B0ECF0827DEE7E__no
2018-11-15T05:57:33ATHec2-PRPCF
3150167
885604230227911
94544808593761468177
457F1A09ACD316__no
2018-11-18T11:32:56Chang Chia-Tcheexbpc13
3150167
885604230227911
94544808593761468177
457F1A09ACD316__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-05-05T09:31:46+00:00