Cryptology ePrint Archive: BibTeX Citation of Report 2010/338

@misc{cryptoeprint:2010:338,
    author = {Joppe W. Bos and Thorsten Kleinjung and Arjen K. Lenstra and Peter L. Montgomery},
    title = {Efficient SIMD arithmetic modulo a Mersenne number},
    howpublished = {Cryptology ePrint Archive, Report 2010/338},
    year = {2010},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.