Newforms by base field: $$\Q(\sqrt{-1})$$   $$\Q(\sqrt{-2})$$   $$\Q(\sqrt{-3})$$   $$\Q(\sqrt{-5})$$   $$\Q(\sqrt{-6})$$   $$\Q(\sqrt{-7})$$   $$\Q(\sqrt{-10})$$   $$\Q(\sqrt{-11})$$   $$\Q(\sqrt{-13})$$   $$\Q(\sqrt{-14})$$   $$\Q(\sqrt{-15})$$   $$\Q(\sqrt{-17})$$   $$\Q(\sqrt{-19})$$   $$\Q(\sqrt{-21})$$   $$\Q(\sqrt{-22})$$   $$\Q(\sqrt{-23})$$   ... $$\GL_2$$ newform spaces by base field: $$\Q(\sqrt{-1})$$   $$\Q(\sqrt{-2})$$   $$\Q(\sqrt{-3})$$   $$\Q(\sqrt{-5})$$   $$\Q(\sqrt{-6})$$   $$\Q(\sqrt{-7})$$   $$\Q(\sqrt{-10})$$   $$\Q(\sqrt{-11})$$   $$\Q(\sqrt{-13})$$   $$\Q(\sqrt{-14})$$   $$\Q(\sqrt{-15})$$   $$\Q(\sqrt{-17})$$   $$\Q(\sqrt{-19})$$   $$\Q(\sqrt{-21})$$   $$\Q(\sqrt{-22})$$   $$\Q(\sqrt{-23})$$   ... $$\SL_2$$ newform spaces by base field: $$\Q(\sqrt{-1})$$   $$\Q(\sqrt{-2})$$   $$\Q(\sqrt{-3})$$   $$\Q(\sqrt{-5})$$   $$\Q(\sqrt{-7})$$   $$\Q(\sqrt{-11})$$   $$\Q(\sqrt{-19})$$   $$\Q(\sqrt{-43})$$   $$\Q(\sqrt{-67})$$   $$\Q(\sqrt{-163})$$ Some interesting Bianchi modular forms or a random Bianchi modular form