is 2 2465129 - 1
has 742078 decimal digits
takes 0.171 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LEF6AAB65B3BE72E8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.053767.1642%2000000600000000.51907.6362%12.572769.6716%2.5074%
PrimeNet2590.031262.7119%100001800000.00192.5312%0.033163.6557%0.9438%
GPU722630.647465.0794%100001600000.00181.3350%0.649365.5456%0.4662%
Difference+4+11.4063+2.0848%+1990000+59840000+0.5171+6.3012%+11.9234+4.1260%+4.1260%

Known prime factors (1 factor, 76.8 bits, 0.00311413% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24651291285977735725961201052792476.76726083376077397191
7 × 2969 × 3637 × 345074021
2018-07-0236373450740216,330.51.89123.5316

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.290%
2003-10-31T00:00:00Team Prime Ribv4_computers15000232500---0.003--0.922%
2010-11-19T22:14:00Jocelyn LaroucheManual testing2000020000---0.002--0.313%
2010-11-25T01:29:00Jocelyn LaroucheManual testing246512246512---0.025--1.519%
2013-10-22T01:36:00David Campeaui5-2500k59000015930000---0.143--5.413%
2018-09-28T17:01:18alpertronManual testing20000006000000012---0.519--7.636%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-08-16T00:00:00ANONYMOUSv4_computers21259--0.031--
2016-02-23T16:29:14Mark RoseManual testing259260--0.031--
2009-01-15T15:47:00Sturle Sundegorro.ifi260261--0.062--
2012-06-08T08:42:00Sebastian HornbostelManual testing261262--0.125--
2013-01-23T08:28:00dbaughManual testing262263--0.398--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.796--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.516--
2015-10-26T11:51:01ramgeisManual testing265266--3.031--
2017-07-16T22:18:22Gordon SpenceManual testing266267--6.063--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.844 GHz-days
Estimated T-Level:1.550
DigitsB1CurvesCompleteFacMiss
201100031 / 1000.31073.230%
255000031 / 2800.11189.502%

New Calculation Method

Total ECM effort:2.844 GHz-days
Estimated T-Level:1.550
DigitsB1CompleteFacMiss
20110001.00036.788%
25500000.09091.358%
302500000.00699.445%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.752
50000500000010.092


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-21T00:00:00ANONYMOUSv4_computersEF6AAB65B3BE72E80.171
2018-05-27T22:08:06kkmrkkblmbrbkoldEF6AAB65B3BE72E80.171


PRP results:
dateuseridcompidcofactorsres64PRP
2018-07-02T07:52:42_p95holder_b_PRPt11_TFL7
128597773572596120105279
5FA32E9AD7E846__no
2018-07-04T17:30:53Martin RussellThunderChoad
128597773572596120105279
5FA32E9AD7E846__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 590000, B2 = 15930000 (P-1 stage 2)
B1 = 590000 (P-1 stage 1)
B1 = 246512 (P-1 stage 1)
B1 = 15000, B2 = 232500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2018-09-28T17:01:18+00:00