is 2 6007979 - 1
has 1808582 decimal digits
takes 1.065 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1A798B8B2AF7A9B2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.945765.6716%1250000500000001.00377.8251%5.949568.3579%2.6862%
PrimeNet2620.102362.9032%260006000000.01473.3304%0.117064.1387%1.2355%
GPU722662.458165.1515%400009000000.02232.4177%2.480565.9940%0.8425%
Difference+1+2.4876+0.5201%+1210000+49100000+0.9814+5.4074%+3.4690+2.3638%+2.3638%

Known prime factors (1 factor, 100.0 bits, 0.00166432% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
600797912604809833600394254792875071913199.992104900581656497087080305
3 × 5 × 7 × 103 × 487829 × 1014127 × 19606109
2017-09-271014127196061093.132e+100.52090.5304

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-05T00:00:00KCv4_computers2500025000---0.006--0.456%
2001-01-08T00:00:00ANONYMOUSv4_computers2500025000---0.006--0.456%
2011-03-19T02:00:00markrtiny1100002172500---0.057--3.216%
2017-09-27T09:52:19mikrS068125000050000000123199.9921.0042.1292.0077.825%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-09T00:00:00ANONYMOUSv4_computers21261--0.051--
1998-09-27T00:00:00ANONYMOUSv4_computers21262--0.102--
2016-02-23T16:39:16Mark RoseManual testing262263--0.163--
2014-01-05T16:11:00krackerManual testing263264--0.327--
2014-01-06T01:05:00lycornManual testing264265--0.622--
2015-09-29T16:34:56Bruno VictalManual testing265266--1.244--
2016-03-09T09:38:05Gordon SpenceManual testing266267--2.488--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.617 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:1.617 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.19482.403%
25500000.01798.266%
302500000.00199.892%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.617


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00Stefano Gibelliniv4_computers1A798B8B2AF7A9B21.065
2001-02-25T00:00:00ANONYMOUSv4_computers1A798B8B2AF7A9B21.065


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T21:14:24alpertronManual testing
1260480983360039425479287507191
6FDFCE5DB1AB48__no
2018-05-03T06:33:58kkmrkkblmbrbkc5.large
1260480983360039425479287507191
6FDFCE5DB1AB48__no


P-1 factor-bounds graph:
B1 = 1250000, B2 = 50000000 (P-1 stage 2)
B1 = 1250000 (P-1 stage 1)
B1 = 110000, B2 = 2172500 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-05-03T06:33:58+00:00