number cruncher

English Thesaurus

1. a computer capable of performing a large number of mathematical operations per second (noun.artifact)

hypernym	:	computer, computing device, computing machine, data processor, electronic computer, information processing system,
definition	:	a machine for performing calculations automatically (noun.artifact)

2. someone able to perform complex and lengthy calculations (noun.person)

hypernym	:	calculator, computer, estimator, figurer, reckoner,
definition	:	an expert at calculation (or at operating calculating machines) (noun.person)