is 2 1671053 - 1
has 503038 decimal digits
takes 0.079 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2150D6AF0EB2C6DAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.781668.6567%1000000200000000.13895.6960%17.920470.4420%1.7853%
PrimeNet2570.011563.1579%70001200000.00092.5698%0.012464.1047%0.9468%
GPU722610.183865.5738%7000800000.00071.2069%0.184665.9893%0.4155%
Difference+6+17.5977+3.0829%+993000+19920000+0.1381+4.4890%+17.7359+4.4528%+4.4528%

Known prime factors (1 factor, 71.9 bits, 0.00430503% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
167105345279371137218275233432271.9391354815530603107
113 × 467 × 1249 × 20555233
2017-09-24124920555233331.130.07650.1427

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-29T17:09:00AxonManual testing100000100000---0.007--0.880%
2012-02-29T17:13:00AxonManual testing200000200000---0.014--1.284%
2012-02-29T18:09:00AxonManual testing300000300000---0.020--1.566%
2012-02-29T18:12:00AxonManual testing400000400000---0.027--1.786%
2012-02-29T19:10:00AxonManual testing500000500000---0.034--1.968%
2012-02-29T19:13:00AxonManual testing600000600000---0.041--2.124%
2012-02-29T20:09:00AxonManual testing700000700000---0.048--2.262%
2012-02-29T20:12:00AxonManual testing800000800000---0.055--2.385%
2012-02-29T21:10:00AxonManual testing900000900000---0.061--2.497%
2012-02-29T21:14:00AxonManual testing10000001000000---0.068--2.599%
2012-03-01T06:09:00AxonManual testing10000008000000---0.094--4.730%
2012-03-01T07:09:00AxonManual testing100000020000000---0.139--5.696%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:28:45Mark RoseManual testing21260--0.092--
2010-04-26T01:40:00Architects Cubedm1_f2260261--0.092--
2016-02-23T16:28:45Mark RoseManual testing261262--0.184--
2010-08-31T00:27:00GrunwalderGIMPManual testing21263--0.955--
2016-02-23T16:28:45Mark RoseManual testing262263--0.587--
2015-05-12T11:31:00omylistManual testing263264--1.175--
2015-05-13T21:27:00monstManual testing264265--2.236--
2015-10-11T16:52:51ramgeisManual testing265266--4.472--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.893 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.893 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024814.71
50000500000030.178


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computers2150D6AF0EB2C6DA0.079
2015-06-27T00:56:00MadPooManual testing2150D6AF0EB2C6DA0.079


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T22:42:35Oliver KruseGTX-3
4527937113721827523343
0646ABB2C0AE57__no
2017-11-02T23:26:27ATHec2-1xf
4527937113721827523343
0646ABB2C0AE57__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000, B2 = 8000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 900000 (P-1 stage 1)
B1 = 800000 (P-1 stage 1)
B1 = 700000 (P-1 stage 1)
B1 = 600000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 400000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
Last modified: 2019-12-16T13:28:28+00:00