<s>
KISS	O
(	O
Keep	O
it	O
Simple	O
Stupid	O
)	O
is	O
a	O
family	O
of	O
pseudorandom	B-Algorithm
number	I-Algorithm
generators	I-Algorithm
introduced	O
by	O
George	O
Marsaglia	O
.	O
</s>
<s>
Starting	O
from	O
1998	O
Marsaglia	O
posted	O
on	O
various	O
newsgroups	B-Application
including	O
sci.math	O
,	O
comp.lang.c	B-Language
,	O
comp.lang.fortran	O
and	O
sci.stat.math	O
several	O
versions	O
of	O
the	O
generators	O
.	O
</s>
<s>
The	O
original	O
1993	O
generator	O
is	O
based	O
on	O
the	O
combination	O
of	O
a	O
linear	B-Algorithm
congruential	I-Algorithm
generator	I-Algorithm
and	O
of	O
two	O
linear	B-Architecture
feedback	I-Architecture
shift-register	I-Architecture
generators	O
.	O
</s>
<s>
It	O
has	O
a	O
period	O
295	O
,	O
good	O
speed	O
and	O
good	O
statistical	O
properties	O
;	O
however	O
,	O
it	O
fails	O
the	O
LinearComplexity	O
test	O
in	O
the	O
Crush	O
and	O
BigCrush	O
tests	O
of	O
the	O
TestU01	B-Algorithm
suite	O
.	O
</s>
<s>
A	O
newer	O
version	O
from	O
1999	O
is	O
based	O
on	O
a	O
linear	B-Algorithm
congruential	I-Algorithm
generator	I-Algorithm
,	O
a	O
3-shift	B-Algorithm
linear	I-Algorithm
feedback	I-Algorithm
shift-register	I-Algorithm
and	O
two	O
multiply-with-carry	B-Algorithm
generators	O
.	O
</s>
<s>
It	O
is	O
10	O
–	O
20%	O
slower	O
than	O
the	O
1993	O
version	O
but	O
has	O
a	O
larger	O
period	O
2123	O
and	O
passes	O
all	O
tests	O
in	O
TestU01	B-Algorithm
.	O
</s>
<s>
In	O
2009	O
Marsaglia	O
presented	O
a	O
version	O
based	O
on	O
64-bit	O
integers	O
(	O
appropriate	O
for	O
64-bit	O
processors	O
)	O
which	O
combines	O
a	O
multiply-with-carry	B-Algorithm
generator	O
,	O
a	O
Xorshift	B-Algorithm
generator	O
and	O
a	O
linear	B-Algorithm
congruential	I-Algorithm
generator	I-Algorithm
.	O
</s>
