is 2 1600061 - 1
has 481667 decimal digits
takes 0.071 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC31FD444A0F485E3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270149.338570.0000%2000000400000000.26365.2461%149.602171.5738%1.5738%
PrimeNet2570.012063.1579%70001200000.00092.5481%0.012964.0967%0.9388%
GPU722610.192065.5738%6500600000.00061.0563%0.192665.9374%0.3637%
Difference+9+149.1465+4.4262%+1993500+39940000+0.2630+4.1897%+149.4095+5.6364%+5.6364%

Known prime factors (1 factor, 101.5 bits, 0.00634320% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1600061357335296418302791822115586049731101.4951116630229779685873920168
23 × 33 × 139 × 283 × 4663 × 488333 × 57712901
2014-05-21488333577129011.187e+110.23360.3804

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-10-31T01:34:00BigBrotherBigBrother200000040000000---0.264--5.246%
2014-05-21T22:41:00mikrColorovo20000004000000031101.4950.2640.1430.5275.246%
2016-03-17T19:17:11alpertronManual testing5000001500000012---0.084--3.711%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-05-01T21:20:00Architects Cubedm1_f2260261--0.096--
2010-06-23T00:16:00GrunwalderGIMPManual testing21263--0.997--
2011-11-09T20:49:00Never Odd Or EvenManual testing263264--1.227--
2011-11-09T20:49:00Never Odd Or EvenManual testing264265--2.335--
2012-03-13T11:11:00Never Odd Or EvenManual testing265266--4.670--
2014-01-18T11:18:00Never Odd Or EvenManual testing266267--9.341--
2014-01-18T11:18:00Never Odd Or EvenManual testing267268--18.68--
2014-01-18T11:18:00Never Odd Or EvenManual testing268269--37.36--
2014-01-18T11:18:00Never Odd Or EvenManual testing269270--74.72--


ECM factoring results:

Old Calculation Method

Total ECM effort:15.811 GHz-days
Estimated T-Level:3.300
DigitsB1CurvesCompleteFacMiss
201100066 / 1000.66051.514%
255000066 / 2800.23678.967%
3025000054 / 6400.08491.903%

New Calculation Method

Total ECM effort:15.811 GHz-days
Estimated T-Level:3.300
DigitsB1CompleteFacMiss
20110004.8870.754%
25500000.68650.379%
302500000.07293.018%
3510000000.00699.408%


ECM Summary

B1B2factorcurvesGHz-days
500005000000120.673
250000250000005415.14


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-07T00:00:00ANONYMOUSv4_computersC31FD444A0F485E30.071


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T03:25:48Oliver KruseGTX-1
3573352964183027918221155860497
E369A99B4E7F28__no
2017-10-31T23:58:31kkmrkkblmbrbkc4.xlarge
3573352964183027918221155860497
E369A99B4E7F28__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 40000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
TF factor-bounds graph:
270
269
268
267
266
265
264
263
261
250
260
270
280
290
2100
2110
Last modified: 2017-10-31T23:58:31+00:00