The last file ( /var/adm/btmp /var/adm/btmps /var/adm/utmp /var/adm/utmpx /var/adm/wtmp /var/adm/wtmps /var/adm/wtmpx /var/log/btmp /var/log/wtmp /var/run/utmp /var/run/utmpx /var/run/btmpx)is larger than 250 MB.
We recommend you back up the file and the clear it out.
For example to clear out the wmtp file you could run the following command:
cp /dev/null /var/adm/wtmp
You should also look into automatic process to backup and clear these files out as they can slow down logins if they get too large.