is 2 1701493 - 1
has 512201 decimal digits
takes 0.080 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
Actual26717.463468.6567%500000150000000.08805.0243%17.551570.2315%1.5748%
PrimeNet2570.011363.1579%80001300000.00102.7318%0.012364.1643%1.0064%
GPU722610.180565.5738%70001000000.00081.3016%0.181466.0218%0.4481%
Difference+6+17.2829+3.0829%+493000+14900000+0.0872+3.7227%+17.3701+4.2096%+4.2096%

Known prime factors (1 factor, 25.2 bits, 0.00147857% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
170149337432847825.15811
11
-1112.633e-121.054e-71.389e-7

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:29:21alpertronManual testing5000001500000012-
skipped known factor: 37432847
--0.088--5.024%


Trial Factoring results:
No TF results for M1701493


ECM factoring results:

Old Calculation Method

Total ECM effort:15.634 GHz-days
Estimated T-Level:24.696
DigitsB1CurvesCompleteFacMiss
2011000263 / 1002.6307.113%
2550000263 / 2800.93939.025%

New Calculation Method

Total ECM effort:15.634 GHz-days
Estimated T-Level:24.696
DigitsB1CompleteFacMiss
201100010.1150.004%
25500000.93639.222%
302500000.05994.267%
3510000000.00399.724%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026315.63


Lucas-Lehmer results:
No L-L results for M1701493


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:07alpertronManual testing
37432847
9E4E5CB1E03011__no
2017-10-18T18:31:08Oliver KruseGTX-2
37432847
9E4E5CB1E03011__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
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2020-03-03T14:21:17+00:00