There are currently no open bugs.

"mpfr4" versions published in Ubuntu

Xenial (3.1.3-2): main/math
Wily (3.1.3-1): main/math
Vivid (3.1.2-3): main/math
Trusty (3.1.2-1): main/math
Precise (3.1.0-3ubuntu2): main/math