Zeta(1,1/2)

is also equal to -Zeta(1/2)*(1/2*gamma+1/2*ln(8*Pi)+1/4*Pi).

3.922646139209151727471531446714599513730323971506505209568298485 2547208031503382848806505231041456914038034379886764996843321856 0187370796648866325531877003002927708284792679262934379740474743 4560678349258709176744625306684542186046544092107149397014020908