prime numbers and repeats

[excelNewbie22]

hi.
is it possible for a formula to write down the actual prime numbers in certain range?
and same thing for repeating numbers out of previous rows?
and in third column to compare the last 2 and write down the same one's?

this is what u help me out with:

22222222222.xlsx
	C	D	E	F	G	H	I	J	K
1	1	2	3	4	5	6	prime	from last 2	compare equal #'s i+j
2	16	24	28	34	35	36	0	3
3	15	18	23	25	29	37	3	2
4	10	16	19	23	24	28	2	1
5	4	12	20	30	35	37	1	0
6	2	11	13	27	28	31	4	3
7	11	13	14	17	21	23	4	1
גיליון1

Cell Formulas
Range	Formula
I2:I7	I2	=SUMPRODUCT(--(MMULT(TRANSPOSE(ROW(INDIRECT("2:"&MAX(C2:H2))))^0,--(MOD(C2:H2,ROW(INDIRECT("2:"&MAX(C2:H2))))=0))=1))
J6:J7,J2:J4	J2	=SUM(--(COUNTIF(C3:H4,C2:H2)>0))
J5	J5	=SUM(--(COUNTIF(C6:H7,C5:H5)>0))
Press CTRL+SHIFT+ENTER to enter array formulas.

Cells with Conditional Formatting
Cell	Condition		Cell Format	Stop If True
J:J	Cell Value	contains "0"	text	NO

and this is what i want it to be: changed row 3 for example

22222222222.xlsx
	C	D	E	F	G	H	I	J	K
1	1	2	3	4	5	6	prime	from last 2	compare equal #'s i+j
2	16	24	28	34	35	36	0	3
3	15	18	23	25	29	37	23,29,37	23, 37	23, 37
4	10	16	19	23	24	28	2	1
5	4	12	20	30	35	37	1	0
6	2	11	13	27	28	31	4	3
7	11	13	14	17	21	23	4	1
גיליון1

Cell Formulas
Range	Formula
I2,I4:I7	I2	=SUMPRODUCT(--(MMULT(TRANSPOSE(ROW(INDIRECT("2:"&MAX(C2:H2))))^0,--(MOD(C2:H2,ROW(INDIRECT("2:"&MAX(C2:H2))))=0))=1))
J2,J6:J7,J4	J2	=SUM(--(COUNTIF(C3:H4,C2:H2)>0))
J5	J5	=SUM(--(COUNTIF(C6:H7,C5:H5)>0))
Press CTRL+SHIFT+ENTER to enter array formulas.

Cells with Conditional Formatting
Cell	Condition		Cell Format	Stop If True
J:J	Cell Value	contains "0"	text	NO