@article{10_4064_aa_30_3_257_265,
     author = {P. Erd\"os and T. Shorey},
     title = {On the greatest prime factor of $2^p - 1$ for a prime p and other expressions},
     journal = {Acta Arithmetica},
     pages = {257--265},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1976},
     doi = {10.4064/aa-30-3-257-265},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-30-3-257-265/}
}