Groups of order 55

This article gives information about, and links to more details on, groups of order 55
See pages on algebraic structures of order 55 | See pages on groups of a particular order

There are, up to isomorphism, two groups of order 55, indicated in the table below:

Group	GAP ID (second part)	Abelian?
semidirect product of Z11 and Z5	1	No
cyclic group:Z55	2	Yes

These can be classified using the classification of groups of order pq, since $55=5\cdot 11$.