The Weierstrass constant appears in Abramowitz % Stegun book at
page 658 in section 18.14.7 (modified form).

.4749493799879206503325046363279829685595493732172029822833310248645579291748838602742756412505\
    0214441890378494262395464775250455209977852395088278081482159208256520291219304177028195998\
    7798787640434238035317917062501617025280384155368197567918948959208385800377880696230531135\
    2501328932960313287420476141141483386898936586936973381412236305749654499852933290238676748\
    0367839354584347133747853781408457513205636767947177753937303171126701964273677927090545939\
    0059162700590739339658873056725967859883289278948234450933173668092884488688469981473097192\
    5496658004900897441756325295787911267410132192280083397163211552215044850953432142042776553\
    0770352389865184846899988963121566767821588005430590250637226667922669838444924405629517007\
    0229363977219816683961793691191760036513222507698899767543938423914088110257839088115881841\
    5010527808474673656436647846207892917851320951718485863521877625134215242952388075691989368\
    741879961035026978940066669357526002137210035099173257389824189753383579436632341815818


to 1000 digits is also this closed expression.

2**(5/4)*sqrt(Pi)*exp(Pi/8)*GAMMA(1/4)**(-2);



































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