is 2 48004871 - 1
has 14450907 decimal digits
takes 83.342 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L205172F1FE9F2EA0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27339.846964.3836%1600000400000009.29445.7264%49.141366.4231%2.0396%
PrimeNet2681.241661.7647%22000090000001.75805.6411%2.999763.9216%2.1569%
GPU7227219.921663.8889%340000110000002.31804.1653%22.239565.3930%1.5041%
Difference+1+19.9253+0.4947%+1260000+29000000+6.9765+1.5612%+26.9018+1.0301%+1.0301%

Known prime factors (1 factor, 90.5 bits, 0.00018853% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4800487117557216725546242716119685912890.50418286911681885618145
5 × 11 × 53 × 337 × 1219433 × 15265603
2018-12-011219433152656039,389,4924.99626.2475

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-10-27T17:18:00ANONYMOUSv4_computers750000750000---1.888--1.920%
2010-01-04T00:00:00ANONYMOUSv4_computers750000750000---1.888--1.920%
2018-12-02T02:06:23mikrS06816000004000000062890.5049.294166.718.595.726%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-06-09T00:00:00Thomas Mullenv4_computers21259--0.002--
2003-10-08T00:00:00Thomas Mullenv4_computers21260--0.003--
2008-04-24T00:00:00ANONYMOUSv4_computers21269--2.487--
2015-07-02T14:27:00Sid & AndyManual testing269270--2.491--
2015-12-04T15:23:18AirSquirrelsManual testing270271--4.981--
2015-12-04T15:23:18AirSquirrelsManual testing271272--9.96--
2017-12-13T20:45:07Sid & AndyManual testing272273--19.93--


ECM factoring results:
No ECM results for M48004871


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-05-03T21:10:00ANONYMOUSv4_computers205172F1FE9F2EA083.34
2010-07-20T00:00:00ANONYMOUSv4_computers205172F1FE9F2EA083.34
2016-09-21T15:03:10Sebastian HornbostelManual testing205172F1FE9F2EA083.34


PRP results:
No PRP results for M48004871


P-1 factor-bounds graph:
B1 = 1600000, B2 = 40000000 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 750000 (P-1 stage 1)
104
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106
107
104
105
106
107
108
TF factor-bounds graph:
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2100
Last modified: 2018-12-02T02:06:23+00:00