is 2 1703717 - 1
has 512870 decimal digits
takes 0.080 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5F15882C7D881577double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.440668.6567%500000150000000.08805.0251%17.528770.2317%1.5750%
PrimeNet2570.011363.1579%80001300000.00102.7324%0.012364.1646%1.0067%
GPU722610.180365.5738%70001000000.00081.3019%0.181166.0220%0.4482%
Difference+6+17.2603+3.0829%+493000+14900000+0.0872+3.7232%+17.3475+4.2098%+4.2098%

Known prime factors (1 factor, 74.8 bits, 0.00438948% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1703717325336845662045286681532374.7849547854651390028
22 × 37 × 227 × 284196173693
2014-01-072272841961736933,542.51,056.61,973.5

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:35:00Jocelyn LaroucheManual testing5000050000---0.003--0.571%
2011-02-11T06:19:00Carsten Kossendeyleela900001507500---0.011--2.353%
2016-03-16T12:29:36alpertronManual testing5000001500000012---0.088--5.025%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-09T00:00:00ANONYMOUSv4_computers21258--0.023--
2010-04-23T13:38:00Architects Cubeda3_bu2260261--0.090--
2010-10-04T14:38:00GrunwalderGIMPManual testing21263--0.937--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.923 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.923 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025114.92


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computers5F15882C7D8815770.080


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:13alpertronManual testing
32533684566204528668153
5B85BB994F09F1__no
2017-10-18T19:07:28Oliver KruseThreadripper
32533684566204528668153
5B85BB994F09F1__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 90000, B2 = 1507500 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
263
261
258
257
250
260
270
280
290
2100
Last modified: 2020-03-03T14:21:34+00:00