Geodesic
Primes of the form \((b^n+1)/(b+1)\)
Journal of integer sequences, Tome 3 (2000) no. 2
Numbers of the form $(b^{n}+1)$/(b+1) are tested for primality. A table of primes and probable primes is presented for b up to 200 and large values of n.
Classification : 11A41
Keywords: prime numbers, generalized repunits 
@article{JIS_2000__3_2_a4,
     author = {Dubner,  Harvey and Granlund,  Torbj\"orn},
     title = {Primes of the form \((b^n+1)/(b+1)\)},
     journal = {Journal of integer sequences},
     year = {2000},
     volume = {3},
     number = {2},
     zbl = {1010.11070},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2000__3_2_a4/}
}
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Dubner,  Harvey; Granlund,  Torbjörn. Primes of the form \((b^n+1)/(b+1)\). Journal of integer sequences, Tome 3 (2000) no. 2. http://geodesic.mathdoc.fr/item/JIS_2000__3_2_a4/