There are currently no open bugs.

"mpfr4" versions published in Ubuntu

Bionic (4.0.1-1): main/math
Artful (3.1.6-1): main/math
Xenial (3.1.4-1): main/math
Trusty (3.1.2-1): main/math
Precise (3.1.0-3ubuntu2): main/math