is 2 2397449 - 1
has 721705 decimal digits
takes 0.162 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L386B241F802DFB63double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.394067.1642%30000001000000000.81158.5055%13.205569.9570%2.7928%
PrimeNet2590.032062.7119%100001700000.00182.4791%0.033963.6363%0.9244%
GPU722630.665765.0794%100001400000.00171.2746%0.667465.5244%0.4451%
Difference+4+11.7283+2.0848%+2990000+99860000+0.8099+7.2309%+12.5381+4.4326%+4.4326%

Known prime factors (1 factor, 76.4 bits, 0.00318516% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2397449971508745996472730242872376.36320261301616770007
97 × 208879398111031
2018-06-159720887939811103112,6941,114,7662,082,073

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.287%
2010-11-08T22:12:00Jocelyn LaroucheManual testing1500015000---0.001--0.244%
2010-11-15T22:52:00Jocelyn LaroucheManual testing2000020000---0.002--0.311%
2010-12-23T17:25:00markrtiny900001845000---0.018--2.604%
2014-08-21T02:33:00Jocelyn LaroucheManual testing116772116772---0.011--1.027%
2014-11-06T23:05:00Jocelyn LaroucheManual testing143544143544---0.014--1.149%
2015-12-11T11:34:23mikrMSI300000010000000012---0.812--8.505%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:13Mark RoseManual testing259260--0.032--
2009-01-15T21:28:00Sturle Sundegaudi.ifi260261--0.064--
2012-06-02T12:43:00Sebastian HornbostelManual testing261262--0.128--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.409--
2015-03-12T10:49:00VictordeHollanderManual testing263264--0.819--
2015-03-12T10:49:00VictordeHollanderManual testing264265--1.558--
2015-11-05T09:47:18ramgeisManual testing265266--3.117--
2017-06-27T22:16:40Gordon SpenceManual testing266267--6.234--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.026 GHz-days
Estimated T-Level:1.700
DigitsB1CurvesCompleteFacMiss
201100034 / 1000.34071.055%
255000034 / 2800.12188.546%

New Calculation Method

Total ECM effort:3.026 GHz-days
Estimated T-Level:1.700
DigitsB1CompleteFacMiss
20110001.09733.395%
25500000.09990.563%
302500000.00699.391%


ECM Summary

B1B2factorcurvesGHz-days
500005000000312.759
50000500000030.267


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-26T00:00:00ANONYMOUSv4_computers386B241F802DFB630.162
2018-05-17T21:10:49kkmrkkblmbrbkold386B241F802DFB630.162


PRP results:
dateuseridcompidcofactorsres64PRP
2018-06-15T05:26:04ATHwork102442
97150874599647273024287
B7660B909BC889__no
2018-06-17T01:02:09Oliver KruseGTX-0
97150874599647273024287
B7660B909BC889__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 90000, B2 = 1845000 (P-1 stage 2)
B1 = 143544 (P-1 stage 1)
B1 = 116772 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
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)
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TF factor-bounds graph:
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Last modified: 2018-06-17T01:02:09+00:00