added code for 2^64-1
added code for 2^64-1

ZahidDev/primesieve,fredwang00/primesieve,fredwang00/primesieve,kimwalisch/primesieve,ZahidDev/primesieve,anatoliyrazin/primesieve,kimwalisch/primesieve,tempbottle/primesieve,fredwang00/primesieve,ZahidDev/primesieve,anatoliyrazin/primesieve,tempbottle/primesieve,tempbottle/primesieve,anatoliyrazin/primesieve,kimwalisch/primesieve