OpenSSH 7.9p1 の RSA既定値は 2048 か

$ ssh -V
OpenSSH_7.9p1 Debian-9, OpenSSL 1.1.1b 26 Feb 2019
$ ssh-keygen -t rsa -N '' -f $(mktemp -d)/key
Generating public/private rsa key pair.
Your identification has been saved in /tmp/tmp.DzYDXLT3rV/key.
Your public key has been saved in /tmp/tmp.DzYDXLT3rV/key.pub.
The key fingerprint is:
SHA256:p+rKDATozuMdungcJNMhayhiB1wek9/yaXFMTkcVeCo matoken@T430s
The key's randomart image is:
+---[RSA 2048]----+
|. .+. ..oo. |
|ooo.o o o . |
|++.o. . = . o |
|O+o. o o E . |
|==o o S o |
|o.. + o |
| =.o . . |
|o *+. . |
|.=..+oo |
+----[SHA256]-----+