is 2 2430569 - 1
has 731675 decimal digits
takes 0.164 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1502EFCC34FADD72double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.225167.1642%2000000600000000.50557.6252%12.730569.6680%2.5038%
PrimeNet2590.031662.7119%100001800000.00192.5245%0.033563.6532%0.9413%
GPU722630.656665.0794%100001500000.00171.3055%0.658465.5352%0.4559%
Difference+4+11.5684+2.0848%+1990000+59850000+0.5037+6.3197%+12.0722+4.1327%+4.1327%

Known prime factors (1 factor, 78.5 bits, 0.00323169% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24305694419960199747994596252072478.54890924392595889987
23 × 503 × 7859313043123
2016-06-10503785931304312346,48541,94478,340

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.289%
2010-10-09T08:01:00Oscar Östlin40000640000---0.007--1.664%
2011-01-18T00:07:00Jocelyn LaroucheManual testing5000050000---0.005--0.614%
2011-01-28T20:02:00James Heinrichi7-9201650003795000---0.036--3.421%
2018-09-28T17:00:18alpertronManual testing20000006000000012---0.505--7.625%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-07-30T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:14Mark RoseManual testing259260--0.032--
2009-01-11T00:42:00Sturle Sundegerle.ifi260261--0.063--
2012-06-05T13:42:00Sebastian HornbostelManual testing261262--0.126--
2013-01-23T08:28:00dbaughManual testing262263--0.404--
2015-02-27T20:40:00VictordeHollanderManual testing263264--0.808--
2015-02-27T20:40:00VictordeHollanderManual testing264265--1.537--
2015-10-25T20:34:58ramgeisManual testing265266--3.074--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.784 GHz-days
Estimated T-Level:1.000
DigitsB1CurvesCompleteFacMiss
201100020 / 1000.20081.791%
255000020 / 2800.07193.094%

New Calculation Method

Total ECM effort:1.784 GHz-days
Estimated T-Level:1.000
DigitsB1CompleteFacMiss
20110000.64552.458%
25500000.05894.336%
302500000.00499.642%


ECM Summary

B1B2factorcurvesGHz-days
500005000000181.605
50000500000020.178


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-07T00:00:00ANONYMOUSv4_computers1502EFCC34FADD720.164


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-13T05:55:20Oliver KruseGTX-348C752B898DC36__no
2017-11-27T15:34:24kkmrkkblmbrbkc4.xlarge
441996019974799459625207
48C752B898DC36__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 165000, B2 = 3795000 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
B1 = 40000, B2 = 640000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
B1 = 40000 (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: 2018-09-28T17:00:18+00:00