is 2 6005141 - 1
has 1807728 decimal digits
takes 1.064 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA2DCCF4502CE634Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2689.925666.1765%1250000500000001.00377.1811%10.929468.6054%2.4289%
PrimeNet2620.102362.9032%260006000000.01473.3302%0.117064.1386%1.2354%
GPU722662.459365.1515%400009000000.02232.4175%2.481665.9940%0.8425%
Difference+2+7.4663+1.0250%+1210000+49100000+0.9814+4.7636%+8.4478+2.6114%+2.6114%

Known prime factors (1 factor, 104.3 bits, 0.00173642% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
60051412452811668652466461696796109753732104.2742042259847564334011222048
25 × 11 × 292 × 283 × 33809 × 325463 × 2215399
2017-09-2232546322153992.311e+100.11010.1702

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-05T00:00:00ANONYMOUSv4_computers2500025000---0.006--0.385%
2011-03-18T06:07:00markrtiny1100002172500---0.057--2.867%
2017-09-22T08:37:43mikrS0671250000500000001232104.2741.0042.1282.0077.181%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-19T00:00:00ANONYMOUSv4_computers21261--0.051--
1998-08-24T00:00:00ANONYMOUSv4_computers21262--0.102--
2016-02-23T16:39:15Mark RoseManual testing262263--0.163--
2014-01-05T16:11:00krackerManual testing263264--0.327--
2014-01-05T21:55:00lycornManual testing264265--0.622--
2015-09-29T13:19:01Bruno VictalManual testing265266--1.244--
2016-03-09T01:41:53Gordon SpenceManual testing266267--2.489--
2017-09-20T17:55:13mikrManual testing267268--4.978--


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)
1998-12-27T00:00:00ANONYMOUSv4_computersA2DCCF4502CE634A1.064
2000-12-07T00:00:00ANONYMOUSv4_computersA2DCCF4502CE634A1.064


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-13T12:23:29Oliver KruseThreadripper
24528116686524664616967961097537
A8B6FE143B2CF7__no
2018-05-03T00:51:23kkmrkkblmbrbkc5.large
24528116686524664616967961097537
A8B6FE143B2CF7__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:
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
2110
Last modified: 2018-05-03T00:51:23+00:00