взаимно простой означает в английский

coprime▼((of two or more positive integers) having no factors in common)
adjective
[UK: kˈɒpraɪm] [US: kˈɑːpraɪm]

relatively prime▼((of two or more positive integers) having no factors in common)
adjective
[UK: ˈre.lə.tɪ.vli praɪm] [US: ˈre.lə.tɪ.vli ˈpraɪm]