News

Efforts (ECM)

number digits date curves B1
$10^{311}+1$ 223 Nov 19, 2017 96 1e8
$10^{295}-91$ 253 May 26, 2016 612 43e6
$500249^{41}-1$ 228 May 17, 2016 1408 1e7
$10^{295}+9$ 296 May 16, 2016 1408 43e6
$10^{271}+3$ 267 May 23, 2016
May 25, 2016
3456
1408
11e6
43e6
$10^{2189}+1$ 1981 Jun 3, 2016 120 6e6
$(7\cdot10^{275}-27\cdot10^{137}-7)/9$ 275 Nov 1, 2016
Apr 11, 2017
16896
19712
11e7
26e7

Efforts (P-1)

number digits date B1 B2
$(7\cdot10^{275}-27\cdot10^{137}-7)/9$ 275 Oct 29, 2016 1e12 1e16
Numbers of the form $10^n+1$
Numbers of the form $(z^{41}-1)/(z-1)$
Near repdigit related numbers
Generalized Fermat numbers
Other numbers
Aliquot sequences