Parallel implementation of multiple-precision arithmetic and 2,576,980,370,000 decimal digits of π calculation

  • Authors:
  • Daisuke Takahashi

  • Affiliations:
  • Graduate School of Systems and Information Engineering, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

  • Venue:
  • Parallel Computing
  • Year:
  • 2010

Quantified Score

Hi-index 0.00

Visualization

Abstract

We present efficient parallel algorithms for multiple-precision arithmetic operations of more than several million decimal digits on distributed-memory parallel computers. A parallel implementation of floating-point real FFT-based multiplication is used, since the key operation for fast multiple-precision arithmetic is multiplication. The operation for releasing propagated carries and borrows in multiple-precision addition, subtraction and multiplication was also parallelized. More than 2.576 trillion decimal digits of @p were computed on 640 nodes of Appro Xtreme-X3 (648 nodes, 147.2GFlops/node, 95.4TFlops peak performance) with a computing elapsed time of 73h 36min which includes the time required for verification.