is 2 1234843 - 1
has 371725 decimal digits
takes 0.038 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD78068E91C92A9F3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270193.506970.0000%1740000487200000.19125.2142%193.698171.5643%1.5643%
PrimeNet2560.007862.5000%5500900000.00042.4304%0.008263.4114%0.9114%
GPU722600.124465.0000%5000300000.00030.8313%0.124765.2909%0.2909%
Difference+10+193.3825+5.0000%+1735000+48690000+0.1909+4.3829%+193.5734+6.2733%+6.2733%

Known prime factors (1 factor, 65.9 bits, 0.00534000% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1234843708142067790581691772065.94128673364459716
22 × 31 × 41 × 5639922199
2014-02-184156399221999.91113.66425.520

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-10-07T00:00:00Jocelyn Larouchev4_computers10001000---4.44667e-5--0.002%
2002-12-25T00:00:00ANONYMOUSv4_computers20000395000---0.002--0.658%
2013-11-10T05:13:00David Campeaui5-2500k174000048720000---0.191--5.214%
2016-03-17T19:02:38alpertronManual testing3000001000000012---0.037--3.053%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-14T00:00:00ANONYMOUSv4_computers21257--0.016--
2003-05-26T00:00:00ANONYMOUSv4_computers21258--0.031--
2022-03-07T17:31:40LordJuliusManual testing258260--0.093--
2008-12-21T05:51:00Architects Cubedi4l_1260261--0.124--
2012-09-14T15:01:00AxelssonManual testing261262--0.249--
2012-10-26T08:03:00dbaughManual testing262263--0.795--
2013-04-09T09:12:00ramgeisManual testing263264--1.590--
2013-04-09T09:12:00ramgeisManual testing264265--3.026--
2014-02-04T13:02:00Never Odd Or EvenManual testing265266--6.052--
2014-02-18T12:58:00Never Odd Or EvenManual testing26526665.941204.0030.0778.130
2014-02-04T13:02:00Never Odd Or EvenManual testing266267--12.10--
2014-02-04T13:02:00Never Odd Or EvenManual testing267268--24.21--
2014-02-04T13:02:00Never Odd Or EvenManual testing268269--48.41--
2014-02-04T13:02:00Never Odd Or EvenManual testing269270--96.83--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.219 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000310 / 1003.1004.435%
2550000310 / 2801.10732.985%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:19.219 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100012.2470.000%
25500001.32626.567%
302500000.10889.804%
3510000000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002669.85
25000035000000449.369


Lucas-Lehmer results:
No L-L results for M1234843


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T16:54:12Oliver KruseGTX-1
70814206779058169177
FB8046FC7D2884__no
2017-10-20T00:00:47kkmrkkblmbrbkc4.xlarge
70814206779058169177
FB8046FC7D2884__no


P-1 factor-bounds graph:
B1 = 1740000, B2 = 48720000 (P-1 stage 2)
B1 = 1740000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 20000, B2 = 395000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-07T17:31:40+00:00