How can I find location of PRI in /proc

I have sshd with PID of 1957: mohsen@debian:~$ ps ax -o pid,nice,pri,cmd |grep 1957 1957 -2 21 sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups According to above, my nice number is -2 and pri number is 21.
According to /proc/1957, I can't find my nice number and pri number.
root@debian:~# cd /proc/1957 root@debian:/proc/1957# cat sched sshd (1957, #threads: 1) ------------------------------------------------------------------- se.exec_start : 211942985.934983 se.vruntime : 31.031644 se.sum_exec_runtime : 23.385935 se.nr_migrations : 14 nr_switches : 57 nr_voluntary_switches : 18 nr_involuntary_switches : 39 se.load.weight : 1624064 se.avg.load_sum : 4366 se.avg.runnable_sum : 4470824 se.avg.util_sum : 1557504 se.avg.load_avg : 147 se.avg.runnable_avg : 95 se.avg.util_avg : 33 se.avg.last_update_time : 211909716609024 se.avg.util_est : 38 policy : 0 prio : 118 clock-delta : 89 mm->numa_scan_seq : 0 numa_pages_migrated : 0 numa_preferred_nid : -1 total_numa_faults : 0 current_node=0, numa_group_id=0 numa_faults node=0 task_private=0 task_shared=0 group_private=0 group_shared=0 Where in /proc are the number pri and nice stored?