Mathematics and Computer Science

Full text of more than 2000 scholarly journals dating back to their first issue. Covers all disciplines except current science topics.

The oldest AMS prize is the Bôcher Memorial Prize (1923). The MAA has the Chauvenet Prize (1925).
The London Mathematical Society's oldest prize is the De Morgan Medal (1884).The Royal Society's Copley Medal (est. 1736, first awarded 1746) is given to mathematicians and also to other scientists, as is their Royal Medal (1826). Their Sylvester Medal (1901) is only given to mathematicians.

The French Academy of Sciences awards the Prix Poncelet (1868). Their Leconte Prize (1889) https://en.wikipedia.org/wiki/Leconte_Prize is sometimes given for mathematics. (Note: these are Wikipedia links, good for initial research, but be sure to verify).

Mittag-Leffler was displeased that there was no Nobel for Mathematics, so he established the Mittag-Leffler Prize, but since there was no endowment for it, it was only awarded twice.