<s>
The	O
congruence	O
also	O
holds	O
for	O
every	O
odd	O
prime	O
number	O
n	O
that	O
justifies	O
the	O
name	O
pseudoprimes	B-Algorithm
for	O
composite	O
numbers	O
n	O
satisfying	O
it	O
.	O
</s>
<s>
The	O
only	O
known	O
Catalan	B-Algorithm
pseudoprimes	I-Algorithm
are	O
:	O
5907	O
,	O
1194649	O
,	O
and	O
12327121	O
with	O
the	O
latter	O
two	O
being	O
squares	O
of	O
Wieferich	O
primes	O
.	O
</s>
<s>
In	O
general	O
,	O
if	O
p	O
is	O
a	O
Wieferich	O
prime	O
,	O
then	O
p2	O
is	O
a	O
Catalan	B-Algorithm
pseudoprime	I-Algorithm
.	O
</s>
